KEY TO THE TSOPODS OF THE PACIFIC COAST OFNORTH AMERICA, WITH DESCRIPTIONS OFTWENTY-TWO NEW SPECIES.By Harriet Richardson.
The isopods of the Pacific coast of North America have claimed theattention of a number of naturalists during the last half of the nine-teenth century. Among the first to contribute to the knowledge ofthe fauna of that region was Dana. Stimpson also belongs to theearlier part of that period; his work on the Crustacea and Echinoder-mata of the Pacific shores of North America, published in 1857, wasthe first si)ecial treatise on the forms of that locality. In connectionwith the work of the later part of the past fifty years, the names ofStuxberg, Lockington, and Harford form one group as contempora-neous workers (1875-7(5), those of Schicedte and Meinert, and Budde-Lund, another group (1883-85), while the publications of Dr. Hansenand Dr. Benedict represent the latest (1898) work on the isopods ofthat coast.The number of species already described is 75, and '22 are added inthe present work. These species represent 44 genera and IG families,as shown in the following table:LIST OF tribes, FAMILIES, (iENERA, AND SPECIES. Page.I. ClIELIKKRA 819Family I. Tanaid;? 8191. Tanais , 8191. loricatus Spence 15iite i 8192. alascensis, new species 819II. Flahellifera. 820Family II. Limnoriidje 8212. Limnoria 8213. lUjnorum (Rathke) 821Family III. Cirolanidai 8223. Cirolana .--. 8224. harfordi (Lockington) 8225. linguifrons, new species ... 8234. Eurydice 8246. caudata, new species 824Family IV. Corallanida? 8255. ('oralland 8257. truncata, new species 825Proceedings U. S. National Museum, Vol. XXI? No. 1 1 75. 815
81G FROCEEDlNiiS OF THE NATIONAL MUSEUM. vol.xxi.
II. Flabellifera?Continued. Page.Family V. ^gid;c 8256. ^ga 8268. microiilithahna Dana 8209. lecontii (Dana) 82()7. Bocinela 82710. cornuta Kiclianlson 82711. helUceps (Stimpson) 82712. laticaiida Hansen 82813. tubercnloxa Richardson 82814. aries Schitrdte and Aleinert 828Family VI. Cymothoida- 8288. Meinertia 82915. (jaudichaudii (Milne-Edwards) 8299. Livoneca 82916. californUa Schicrdte and Meinert 82917. vulgaris Stimpson 83018. j;awamejjsis ScbioMlte and Meinert 83010. Nerocila 83019. californica Schicedte and Meinert 83011. Anilocra 83020. occidenlalia, new species 830Family VII. Sph:eromidiu ..'. 83112. Dynamene 83221. dilaiata, now species 83222. tuberculosa, new species 83323. benedicti, new siieciiiti 83424
.
glabra, new species 83413. Sphwroma 83525. aviplicauda .Stimpson 83526. rliomburiim, new sitecies 83527. octoncum, new species 83628. oregotiensis Dana 83614. Tccticeps 83629. alascensis KicLardson 83730. convexus, now species 83715. Ciliccea 83831. cordata, new species 83932. caudata giUiana, new subspecies 84033. granu losa, new species 841Family VIII. Serolidie 84216. Serolis 84234. carinata Locliington 842III. Valvifera 842Family IX. Idoteida* 84217. Glyptonotus 84335. entomon (Linnicns) 84336. sabini (Kr^yer ) 84418. Idotea 84437. resecata Stimpson 84438. gracillima Dana 84439. urotoma Stimpson 84540. rectilineata Lockington 84541. wosnesenskii Brandt 84642. ochotcnsis Brandt 846
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 817
III. Valvifera?Continued.Family IX. Idoteida)?Continued.18. Idotea?Continued. Page.43. stenops Benedict 84644. whitei Stimpson 84619. Synidofea 84745. itaUida Benedict 84846. erosa Benedict 84847. nehulosa Benedict 84848. angulaia Benedict 84849. consolidata (Stimpson ) 84850. bicuspida (Owen) 84851. laticauda Benedict 84952. harfordi Benedict 84953. nodiilosa (Kr0yer) 84954. Iwvis Benedict 84955. muricata (Harford) 84956. piota Benedict 84920. Colidotea 84957. rosirata (Benedict) 84921. Cleantis 85058. occidcntalis, new species 85059. heathii, new species 85122. Eusymmerus 85260. antenuatus, new species 853Family X. Arcturidie 85323. Arcturus 85361. beringaniis Benedict 85462. longispinin Benedict 85463. intermedins, new species . 85464. murdoch i Benedict 85565. glaber Benedict 855IV. ASELLOTA 856Family XI. Asellidte 85624. Asellus 85666. tomalensis Harford 856Family XII, Janiridiu ? 85625. Jcera 85767. icakishiana Spence Bate 85726. lanthe 85768. triangulata, new species 857
, 69. erostrata, new species 85827. Janira 85970. occidentalis Walker 85928. Jwropsis 85971. lobata, new species 859V. Oniscoidea 860Family XIII. Oniscidaj 86129. Porcellio 86172. formo8U8 Stuxberg 86273. Icevis Latreille 86274. scaber Latreille - '. 86330. Metoponorthus 86375. i)riiinosits Budde-Lund 863Proc. N. M. vol. xxi 52
818 PROCEEDINGS OF THE NATIONAL MUSEUM. vouxxiV. ()NiS(X)ii)KA?Continued.Family XIII. Ouiscida^?Continued. V&i^e.31. Allomacita 86476. mirahilis ( Hudde-Lund ) 86477. corniitnn I5udde-Lund 86478. perconre.ni8 Dana 86432. Lyp7'obinfi 86479. pusiJlux I')udde-Lund 864Family XIV. Armadillididai 86533. Cuharis 86580. califoriiica (Stuxberg) 86581. affuiin (Dana) 865Family W. i.igiidic 86534. Ligia ". 86682. occidenlalis Dana 86683. pallasli Brandt 86684. exotica Koux 86635. /Atjidimn 86685. hypnoritm (Cuvier) 86786. tenite liudde-Lund 86736. Styloiiificiia 86787. (jracilis Dana 867VI. El'UAIUDEA 867Family XVI. IJopyridie 86737. Argeia 86888. piigvUenxia Dana 86889. depanperala Stimpson 86838. Phyllodurua 86890. abdomiiiaUs 8timpson 86839. Jiopyroidcs 86891. aciitimarginatuH Stimpson 86840. I'netidione 86892. giardi Caiman 86993. galavanihw Hanson 86941. Jiathygyge 86!)94. grandia Hansen 86942. dryptione 86995. elongata Hansen 86943. I'arargeia 86996. ornrtia Hansen 86944. lone 86997. cor/f H ^j Spcnce Bate 869Tlie author has used Dr. Beuetlict's keys for the j^enera Synidoteaand Arcturvfi, aud is indebted to Professor Siirs for niauy suggestionsobtained from his excellent work on the Crustacea of Norway. Inmany places his synopses of the families and genera have been usedin entirety. Other authors have been most helpful; Hansen on theCirolanidfv; Biihwdte and Meinert on the (Jymothoidw; Budde-Lundonthe Oniscidfc, nud others, to whose works specific references are made.The present paper is based on material contained in the U.S.NationalMuseum.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 819ANALYTICAL KEY TO TRIBKS.OIJ StII'KHKAMII.IKS OK I'ACIKK; COAST ISOPODA. '
a. L<^fj;8 of first pair clicliform. llropocla tcruiiual. I'lcopoda, wlicii distinctly<loveloi)cd, oxcliisivcly natatory I. Ciielikeka (p. 811)).a' . Le^s of (irst i)air not chclilbrm.h. lJro]>o(la l;i(eral.c. llropoda lonniiifj; i (({bother witli the terminal sojjnientof tlio niotasonieacandalfan. I'leopoda for tiie most part natatory II. Fi.ahkllikkua (p.820).c' . llropoda valvolik(?, indexed, archinj^ over the plcopoda, which to a greatextent are branchial , III. Val\ii'Bka (p. 842).6'. llropoda terminal,c. Free forms.d. rieopoda exclusively branchial, gcuer.illy covered by a thin opercular plate(the niodilied first pair) IV. Asellota (p. SHG),d' . Plcopoda litted'for air-brciathing V. Omscoidka (p. 8f)0).o'. Parasitic forms VI. Ei-icakidea (p. 8G7).
I. CHELIFERA.Family 1. TANAID^E.Body scarcely attenuated behind. Mandibles without palp. Coxalplates incous[)icuous. Superior aiiteniiii' with one multiarticulatertagellum. Anterior niaxilhe with only a single masticatory lobe; j^os-terior ones quite rudimentary. Second ])air of legs ambulatory incharacter. Epignath of nuixillipeds narrow, falciform.1. TANAIS Audouin and Mihie-Edwards.AnteuDic short, subecjual. Pleon five-Jointed; fourth joint short;fifth joint terminated byapairof single brani-Iied (ihimentary iiropoda.Only three pairs of pleopoda. Palp of anterior ma.\ill;e biarticulate.Eyes well developed. Superior antennie three-articulate, with smallterminal Hagellum.analytical key to TIIK Sl'KCIES OK TANAIH.
a. Inferior antennse scarcely half the length of superior antenna;. Peroiopoda hav-ing the first three Joints short and broad, affixed to sides of pereion like platesof mail 1. Tanain loricatus Spence IJate.a'. Inferior and sMi)crior aQtenuu) of nerrly equal length. Pereiopoda with jointsnot dilated, slender 2. Taiiais alascensls, new species.
I. TANAIS LORICATUS Spence Bate.Tanain Ioricatiin SvKNCii Hate, Lord's Naturalist in liritish C(ilmn)>i;i,, II (18GG),p. 282.Habitat?Esquiraault Harbor, British Columbia.
2. TANAIS ALASCENSIS, new species.Body three and a half times longer than broad.Head large, narrowed anteriorly. Frontal margin almost straight.
' Sars's analytic key has been used with slight modifications. Sars's "An Accountof the Crustacea of Norway," II, Isopoda (1896), Pts. I, II, p. 3.
,S2() I'liociCKDiNca or riiic national musuvm.
.X
a
l^'irst. \r.UY of ;mi1;<iiiii!I' sliorl,, st,(Mil, ('.(mHisl.iti}^' ol' lour JoiiiiH, Wns first,joiiil/ bciiii^' Mic l(iii<;o>sL ISocoimI p:i,ir of iiiitciiiiiM' more sIciuUm', ii lil.tUil()nj;(M-, coiisisiiiif;' <)( (bur joiiils, llio lirst Joint beiii^loiif^cst, iiiid ;i nidiiiuMitjiiy llji^cllum. JOycs Hiiiiilliiiid piMliiiK-uliiU'd.Tho lirst se{;inoiit of" the thorax is coniliuiiil withthe hciid. Tho second, third, fbuith, and filth hc^-iiKMils incn^iisi^ slightly in hMijj^lii; tho fifth :iii<l sixthjiro jibont o(iiiiil; tlio s?iv?Mdli is not <|uito so lonfjf ;iHtho i)r<')oodinj;' one.
'V\\Vi id)<h)ni(Mi is ooinposod of (ivo so{jfnionts, tliofirst thr(M^ of whioli ;^r(^ subtMiual; liM^ Iburtli is siiort,iiboiil' hiilf as U)n^- as any of (ho others and alsonjirrovvcr; tho (orniinal sofj^nuMit is as h)ng jis thetwo |>ro<'('.dinj;" oiu^s (of^ef iior, and is roniMhMl pos-teriorly, with a> sli/^ht median notcli. The S(^gnientsof the abdomen decrease in widtli {?radually fromthe first to tlie terminal segment. ^Plu^ terminal fila-mriits ar(^ seven Jointed and sinf^le brancln^d, andare furnished at their extremities with a, few lonj;-hairs.The first. |>air of l(^.l;s are stout ainl ('Inflate; thejM'opodus is produ(',e<l info a. stnni^' immovable finj;(ir,iri'e^nlai' in slia.|)e, havinjjf its eentral i)ortion raisedand trun(?at(^ on its ui)per surface, which is ilistinc/tlyserrate. Tln^ dacfybis is likewise si^rrate on its innersurfa(!e. IMie otluu- le;;s aie slender, with a gradualincrease in stoutness.doloi" bi'own, marked in some si)ecimens with a.darker bi()wn,a.nd having oval pa(<'hesof lh(^ darK(^r (loloron the In'ad.Kyska, Harbor, Alaska.; Mr. W. II. Dall collector; depth, (> to Hfathoms.Ti/pv.?No. Ii2r>(?;{, I J .S. N . M
.
/
Fid. I.?'rANAlH AI.AH-(JICNHIH, NICW Hl'IlWillCH.X 8. a, IIDIIHAI.VIHW;l>, I.AHT TW) .HUNTSOK I.ICO OK TlIK KliwrI'Alll.
11. FLABELLIFERA.
ANAI.YTICAI, K|.;Y i'O IlIK lAIMll.lMS 0|.' KI.A IIKM.I KICKA
a. Plooii <i()nHis(iin^ oC nix hoj^iiumiLh.b. llropoda witli ono ol' t.lu^ Itnuiolu^H nhiiosl. oliHoloto or riiiliinoii(.a.ry?not, laiiK^lli-form Fuiiiily II. liiMNomiD.i': (p. S21)./('. llropotliii wiMi bot.li braiichoH (I(^v(^l()po(1 ; mostly liinu^llilbrin.
<!.' MiixilliptMlH with (.ln^ palp IVtMi, i\w inargiiiH ol" tho last two Joints nlon^ orleas autoue, never ^llnlish(^(l witli IiooKm.
'Tho ("our points foHowin^ /?' aio taiktin from I laiistMi's analytic key ?f the Ciro-laniiia? (Vidonsk. Solsk. Skr., (>th stvr., natiir. Oi*- math. Mil. V, 181)0, p. lUT), as trans-latiHl by Stebbinji', Hist, of Crnst., 18!t;$, i)p. :tl(l, Ml. J
No.im. isnr<n>f< or riiF. i-jriric ro.isr incii ii:i>s(i\. X2\
d. M:iinli)il(?.s wiUi llio ijiUmw hioail, inoro or Ionh tridoiit.iiUi, laiU.iii^ <t(l;<(miiK^nlin^ Hi|iiiM'(d,v Ix^liind tito lllr^l^ iipiuM' li|i; tlio Hitcoiiilary ])liii<<t uixlp(i(!uliiir (i(iiiiviil(iiit- lor tlio inoliir woll <l(U'nl<?|?(Ml. I'MtmI, iiinxillit^ liiivlii^jtho pliilo of ilit^ iiiHt Joint. iiriiKMl willi llinMt HpiiioN, Mini, of Mio IliinI wiMimany. HucoikI nnii^illir of iiiodornlo hwxi, {\w tlim^ IVoo plll,t(^s v(M',v h<^I(iho.Maxilliju^dH \vil.li \\w pulp riilli<M' Inond, very Hotcmr.I'liiiiily III. (IiKoi.ANiK i; ( p. 82li).(/'. Miiiidihios wil.li l.ho diHtiil pint, prodMcrd into !i. loiij; pidiniin'iil, piocoHH,liio piuriimcli ovciliipitiii;^; tlio wHMtiidiiiy platd and inoliir rviiiHiHconl..KiiNt, iiiaxilltr liiiviii){ t.lio plaio of [\w Vivnl Joinl, iitiarin<>d, ol' i\\\\ lliird(iiiriyiiifj; our viM'y lon^Hpino, Srcoiid iiiiixillii' Hinall and I'luddc, Uio 1V(?(]?lat.<iN aInioHt i ndinHnil.ary, wlUi low hc'Im'. MaxilllpcdH wiMi l,In^ paJpiiarrowtMl, not vt>ry H^ioHO I'ainily IV. (loitAM.ANin.i'; (p.SLT)).(1^ M:iiXillip<MlH vvitili tlll^ palp onihriic.in;;' llin (mhio l'i)nn(i<I l>y lliodiHtal piirts oftlin niouMi or^iuiH, l.lio iinxM' iippor nuirKln an<l apcix novor NtdoNo, l,1ioapoN and HonioMnioH tJio innor npp(M' margin at loaHt< in t.ll<^ nniloH andf(^nlal^^H without (?;;^>;h, licinjj; I'urniHiKMl with (intward cnivod IiooUh.
<i. M,'iiidihl(?H with thr N?((iondary plutt^ vory olton viHililo; palp with no inlhiludJoint. Maxillip?^ds (tonunonly Hinun-Jointnd, Moinntinn^H fonr-jointod, IholiiNt Joint in tho htttc^' (wiho ratluM'Hliort. ohttiHr. Antonnir ' hni^, uno(|nal,with woll-dclintMl p(^dnn<dl^ and liii^olluni .. .. I''ainiiy V. /1''.(iii>.i': (p.SL'5).d'. Man<liidt^H with no N<?'ondary platr; I ho palp in adnltN with IliHt Joint orboth lii'Ht and Mocond JointH inll.iti-d. Ma,\illipodH alwayN fonr-Jointud,last Joint lalhor Ion;; nnd n;iirow, Hnlla(ut(^. Aiitrnnir' ninr.h rodnciMlwitliont <d(^a^ diMlinctinn lll^tw<M^n podnntdo and llii|;olluni.{''aniily VI, ( !vM(?iii(Hi>.|i; (|?. 828).a' . I'hion confiiHtin;; of Iohh than hIx HoninrntH./'. I'hton with two Ko;{nH>ntH. Utopoda with ono hraindi lixod, iiiiino\ tihlo.I'jiinily VII. Hi'ii i:it(>Mih K (p. 8:n).h'. i'loon with lour H(^^nl?nts. Uropoda with hotii liramhoH niovahli<.I''iiniily \lll. Skkoi.iim: (p. 8lli).Kiunily II. l.lMNOIil I l>,K.2. I ,1 M N( )in A I ,<-n<-li.3. LIMNORIA LIGNORUM (Rathkc).(hpnothoa Htjnornm Uaiiikii., SKiivt. .iC Nalnih. .'^clNk., V, I7'.t!l, ji. 101, pl. :;, llfr.II (VVhito).lAmnoiia IciiehraiiH Lkacii, Md. ilncyid., VII, 1H1!{, p. IH;? (Am. cd., ]>. 'JiT<i);TranH.Mnn.Soc,., Xl,I81i"), p.;i7I ; Diet. H<d, Nat., .\II, IK18.p.:i,'');t.? Dicsmakkht,(tonnid. (iruHt., \H'2r>, p. ;{12.? Latukii.i.k, Ur^jim Anim., IV, 182il, jt. 1:15.?Mmwauds, Ann(d,. dn liiiniandt, V, lH:i8, p. 27(1; Hint. Nat. doH (-'niHt,, III,18-10, p. 145; h'c?no Anini., <!inHt., 181i?, p. 1!I7, pl. (>7, li^. 5.?(Joui.D, Invort.MaHH., 1810, pp.;{:{8-;{iVl.? ViciiHii,!,, I'roo. Am. Ahmoc,., I87:{ (1871), p.lJfl?.lAmnorin Htiuorinn WiiriK, Toi*. IliHt. Hrit. (!niHt., 1857, p. 227, pl. 12, !!>?. .5.
?
IUtk, Ko]?. Mrit. Ahhoc.., 18(!() ( 18(11 ), p. 225. ? IlATK and Wkktwooo, Uril,. Hohh.OniHt., II, I8(;k, p. ;{51.?NoKMAN, Kop. Hrit. Ahhoc, 18(;8 ( I8(;!)), p. 288.?VicitiMi.i., Am. .lonin. Sci., I{<1 hw., VII, 1871, pp. \\V.\, \'.\')\ I'roc. Am. Ahhoc,.,187:t(187'l),p. :{71 ; Kciport lI.S.(;omniiHHiomM<)ri''iHhan<l I'MHlniiicH, IH7I, I't, I,p. ;{7!t (85).
?
IIaucicu, licport II. S. ConimiNHioiHT ol" I'MhIi .-itid l''iNhnri(iH, 1871,I't. 1, p. 571 (277), id. VI, li^r. 25; I'roc,. U. ,4, Nat. Miih., II, 187i?, p. UII.?KTiciiitiNd, TraiiH. Dovon. Ahhoc., 1871, p. 8; Ann. Ma.^. Niit. Hint,., Ith nor.,XVII, 187(1, p. 7!t.?Smith, I'roc H. H. Nat. Miih., II, 18711 (1880), p. 2:{2, tig. 2.
'Insei'tod liy aiilhor.
822 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,.xxi.Limnorla uncinata Heller, Vcrh. k. k. Zool. Bot. Gcs. Wieu, XVI, 1866, p. 734.Limnoria liynorum Harger, lieport U. S. Commissioner of Fish and Fisheries,1878, Pt. 4, pp. 373, 376. (See Harger for further synouymy.)Limnoria californica Hewston, Proc. Cal. Acad. Sci., V, 1874, p. 24 (nomennudum).Eahitat,?Pacific Ocean ; Bering Island. Also found on East coast ofNorth America from Florida to Halifax, on the coast of Great Britain,and in the North Sea. Specimens from San Diego, California, collectedby Mr. Henry Hemphill and labeled ^'Limnoria californica Hewston"are in the National Museum.Family III. CIROLANID^.ANALYTICAL KEY TO THE GKNERA OK CIR()LANID>5?. '
a. Peduncle of second anteun:c iive-jointed. Plate of second .joint of maxillipedsfurnished with hooks. First and second pleopotls alike, with at least innerbranch snbmerabranaceons. Uropoda with inner angle of peduncle produced.3. Cirolana.a'. Peduncle of second antennae four-jointed. Plato of second joint of maxillipedswithout hooks. Pleopoda with both branches submenibranaceous. Uropodawith inner angle of peduncle very little produced. Superior antenna- withfirst joint of peduncle quite short, and extended straight in front at a rightangle to remaining part of the antenna 4. Eurydice.3. CIROLANA Leach.ANALYTICAL KEY TO SPECIES OF CIROLANA.
a. .Head without median process. First pair of antenna- reach apex of peduncle of8c<(md pair of antenna;. Terminal abdominal segmcMit subtriangular, armedon its posterior margin with twenty-six spines. Hoth branches of the uropodarounded posteriorly and armtMl with spines. 4. Cirolana harfordi (Lockington).a'. Head with long, straight median projection. First pair of antcnnie reach theposterior ludrgin of the third thoracic segment. Terminal abdominal segmentrounded and crenulate on its posterior margin and fringed with long hairs.Inner branch of the uropoda obli<iuely truncati- posteriorly.
.5. Cirolana linguifrona, new species.
4. CIROLANA HARFORDI (Lockington).JEga harfordi Lockington, Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 46.Cirolana californica Hansen, Vidensk. Selsk. Skr., 6th ser., natnr. og math.Afd. V, 1890, pp. 338, 339.Habitat.?Victoria, British Columbia; California: Santa Rosa Island,San Diego, Catalina Harbor, Pacific Grove, Monterey Bay; LowerCalifornia, specimens lighter in color.Miers^ remarks upon having examined s)>ecimens of JEga harfordi,sent by Mr. Lockington to the British Museum and designated Idotea
' The cliaracteis in this key on the Cirolauidie are taken from Stebbiug, " Historyof Crustacea," (1893), p. 342.
'^Miers, Journ. Linn. Soc. London, XVI, 1883, p. 19.
NO. 1175. ISOPODS OF THE I'ACIFIC COAST?RICHARDSON. 823harforcU in a manuscript note of the author. He considers that thespecimens belong to the genus Cirolana, or a closely allied type, withoutfurther identifying them. Hansen' also states that, according toMiers, .Efja harfordi is probably a Cirolana. lie had not seen Lock-ington's description, but followed Miers regarding the systematic posi-tion of the species.Specimens of 2Ega harfordi were sent by Mr. S. J. Holmes to theNational Museum from the California Academy of Sciences, whichprove to be identical with Cirolana californica Hansen.
5. CIROLANA LINGUIFRONS, new species.Color, yellow, marked with scattered black dots. Body elongate-ovate, about live times longer than broad, greatly convex.Head with the frontal margin i)roduced in a long, straight proc-ess, rounded anteriorly and somewhat dilated.Eyes large, distinct. First pair of antenna' withjoints of the peduncle large; Hagellum of fifteenshort joints extends to the posterior margin ofthe third thoracic segment. Second pair of an-tenna', with a tlagellum of thirteen long joints,extend to the posterior margin of the fifth thoracicsegment.The first three segments of the thorax are short;the other four segments are long. The epimera ofthe second, third, and fourtli segments are not pro-duced at the apex; those of the fifth, sixth, andseventh but slightly produced.All the abilominal segments conspicuous, thefirst five being of equal length. The terminal seg-ment is rounded i)osteriorly, faintly crenulate andfringed with long hairs. The base of this segmentis raised above the other portion and has a well-defined edge with two points extending backward,one on either side of the median line. The uropodaextend beyond the tip of the abdomen; the innerbran(;h is obliquely truncate; the outer branch is more rounded; bothbranches are fringed with long hairs.The prehensile legs are short; the gressorial legs are long and slender.The legs increase gradually in length from the first to the seventh ])air.Two specimens, from Monterey Bay, California, collected by Mr.Heath from sandy shore at mean tide.Type.?Bo. 22564, U.S.N.M.
Fifj. 2.?Cirolana lin-fiUIKEONS. X 13J. a,HKAU; ?>, TERMINAL SEG-MENT.
'Hansen, Vidensk. Selsk. Skr., 6th ser., iiatur. og math. Am. V, 1890, pp. 338, 339;for syuonyiuy see p. 357.
g24 PROCEEDINGS OF THE NATIONAL MUSEUM.4. EURYDICE Leach.
6. EURYDICE CAUDATA, new species.Body elongate and narrow. In male, abdomen is equal in length, tothorax; in female, it is shorter. Surface of body smooth.Head widely rounded in front; its anterior margin narrowly thick-ened. Eyes large and round and situated at a distance of one-third thewidth of the head apart. First pair of antenn.c extend to the posteriormargin of the head; tiagelluin contains live articles, the first of whichis very long and those following quite short. The second pair ofantennae extend as far as the posterior mjirgin of the fourth segmentof the abdomen; the tlagellum consists of twenty-five long, slenderjoints. In tlie female, the second pair of antenmc are much shorter,reaching only to the posterior margin of the last thoracic segment; theliagellnm contains about twenty Joints.The thoracic segments are subequal. The epimera are narrow, andthose of the last three or four segments a<;utelypointed.All the abdominal segments arc visible in adorsal view. The terminal segment is ronndedat the sides and truncate at its extremity, thelateral angles being produced in a short tri-angular process, between wliich the posteriormargin is distinctly denticulate, and bears fourFio. 3.?EoRYDicE CAUDATA; splucs, whlcli arc about twice as long as the lat-LAST TWO ABLOMiNAL BEO- ^^^^ ^^^^^^^ rpjj^. uropoda axc sliort, not reachingMENTS. (iRKATI.YENLARfiEI). 'the extremity of the terminal segment, are trun-cate and crenulate on their posterior margins. The uropoda, as well asthe terminal, segment are fringed with short hairs.The legs arcdong aiul slender and armed with many spines.(3olor, light brown marked with black spots.Individuals of this species were collected at Isthmus Cove, CatalinaIsland, California, by the U. S. Fish Commission steamer Albatross.Type.?^o. 225G5, U .S.N.M.This species resembles U. grimalcUi Dollfus ' more closely than it doesany other species of the genus. It differs in the following characters:1. The greater number of joints in the tlagellum of the tirst i)air ofantenn.e. In our species there are live joints, while in U. (jrinialfHithe tlagellum is uniarticulate.2. In the fewer number of joints in the tiagellnm of the second pairof antennic. In our species there are only twenty-live, while in J7. gri-maldii the tlagellum contains thirty-two articles.3. In the presence of four spines on the posterior margin of theiBull. Soc. Zool. France, XIII, 1888, pp. 35, 36; Sar Quelques CrusUcda Isopodes duLittoral <les A^oies, A. Dolllus.
NO. ii7n TSOT'ODS OF TTIK VAriFTC COAST?RICHARDSON. 825teriniiuil segment. In /^\ ry/mn/r/ii the posterior marjj^in is doiitieuliito.In our species it is denticiiliite, and also bears four s[)iues.Family IV. CORALLANIDJC.5. CORALLANA Dana.
7. CORALLANA TRUNCATA, new species.Body elongate, about three and a half times longer than wide; color,yellow.Head witli a small median point. Eyes large, situated but a little dis-tance apart. First pair of antennas with a tlagellum ofabout nine articles, extend to the antcro- lateral angleof the first thoracic segment. Second pair of antenna',broken in specimen.First segment of the thorax is as long as the head,and about one and a half times longer than any of theother segments. Epimera of the second and third seg-ments narrow; those of the remaining segments verybroad.The lirst abdominal segment is almost entirely coveredby the last thora(;ic segment. The second, third, andfourth segments are tuberculated on their posteriormargins. The fifth segment is also tuberculated, thetubercles on either side of the media,n line of tuber-cles being larger and more conspicuous. At the baseof the terminal segment are four tubercles, the twocenter ones being the larger. The terminal segment issubtriaiigular with truncate apex. The posterior nuir-gin is armed with spines. The inner branch of theuropoda is truncate posteriorly, and armed with spines;it is about twice as broad as the outer bran(;h, which islanceolate in shape.There is but one specimen, from Oatalina Island, California; collectedby Dr. J. G. Cooi)er.Type.?1^0. 2li5(;(;, U.S.N".M.Family V. yl^^dlDyF.
Kio. 4 C'ouAr,-I.ANA 'I' 11 i; N -
? ATA. i;ij.a, IIICAI); 6, All-DOM EN ANDLAST TirOIlACICKICOMENT.
ANALYTKJAL KKY TO (IKNKRA OK .IXUD^:.
a. Body rather (Muupaot. Superior aiiioiiiin! nhort, with (iiHt two |?e(liiii(iilar jointHmore or less e.^cpaiuled. KpLstoiiie larj^c, lin^iiironii, piojcsct.iiiff bitween tiiebasos of inferior antonine. Maxiliipeds with palp coiiipoHcul of live .jointH.Anterior pairs of Icj^s witli piopodiiHKiiiiple, eylinchical, notexpand('<i,dactyliiH:ibiiiptly curved in middle. i'Yoiit Heparatinj^ the whole or a f;rea,t juirt ol' the(irat article of Wio (irst pair of aiitenna-. Fhij^dlliira of (irat pair of antennaecomposed of many artielcH. Abdomen compact (>. yEtja.
826 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi.
a'. Body more depressed than in y7s>/a. Superior antennip short, with basal jointsnot expanded. Epistome very small and narrow, Maxillipeds with palpcomposed of only two joints. Anterior pair of legs with propodus more or lessexpanded, dactylus forming a very largo and evenly curved hook. Front cov-ering more or less the peduncle of the iirst pair of antenna". Flagellumof tirstpairofantennsB composed of four to six articles. Abdomen relaxed..?. Bocinela.6. ^?GA Leach.ANALYTICAL KEY TO 8PECIKS OF .EGA.
a. Eyes very small; second joint of first ]iair of antcun;i' without process at itsapex; terminal abdominal segment triangular, with rounded apex; innerbranch of uropoda with apex faintly arcuate obliquely.8. yEga microphthalma Dana.
a'. Eyes almost contiguous; second joint of first i)air of antenna" with a process atits apex nearly as long as following joint; terminal abdominal segment withits apex arcuate-truncate; inner branch of uropoda subtruncate.9. jE(ia lecontii (Dana).8. iEGA MICROPHTHALMA Dana.
^lii/a microphthalma Daxa, Proc. Acad. Nat. .Sci. Phila., VII, 18.')4, p. 17fi.?Stimp-soN, .lourn. Bos. Soc. Nat. Hist., VI, 1857, p. 68.Habitat.?Monterey, California.
9. iEGA LECONTII (Dana).JEgacylla lecontii Dana, }?roc. Acad. Nat. Sci. Phila., VII, 1854, p. 177.?Stimp-SON, Journ. Bos. Soc. Nat. Hist., VI, 1857, p. 69.Habitat.?California.Body elongate, oval; surface smooth ; color yellow, with a few browndots; eyes reddish brown.Head with anterior margin bisinuated, the median point separatingthe basal joints of the first pair of antennae and extending one third thelength of these joints. Eyes large, oval, very close to-gether at up[)er inner angle. First pair of antennie withbasal joints very large, dilated; second joint of peduncledilated, and with a process at its apex extending nearlythe length of the third joint; third joint very narrow,about one-third the width of two preceding joints; llagel-lum, composed of seven joints, extends the length of thepeduncle of second pair of antenu;e. Second ])air of nn-teuuiv, with a tlagellum of twelve joints, extend almost tothe posterior margin of the first thoracic segment.The last four thoracic segments are each a little longerthan any of the first three. The epimera are narrow, withFio.r>.?jioALE rounded post lateral angles.coNTii (DANA). rpj^g g^g abdominal segments are of equal length. Theterminal segment is subtriangular with truncate extrem-ity; its posterior margin is creiuilate and fringed with hairs. Theuropoda exceed slightly the length of the abdomen. Tlie inner branch
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHAEDSON. 82'is about twice as wide as the outer branch; is obliquely truncate, andcrenulate. Theouter branch is narrow, rounded posteriorly, and smooth.Both branches are fringed with hairs.The legs are long and slender. Five spines are present on the merusof the prehensile legs. The gressorial legs are but slightly spinulose.Two specimens examined were collected at Monterey Bay, California,by Mr. Heath.The description of this species of u^ga by Dana as u^gacylla lecontiiwas from a young specimen.' The individual sent us is thought to bethe adult form, and differs from Dana's description^ of the young indi-vidual in the crenulated posterior margin of the terminal segments, inthe truncated inner branch of the uropoda, and in the addition of twojoints to the length of the flagellum of the second pair of antennae.7. ROCINELA Leach.ANALYTICAL KEY TO SPECIES OF HOCINELA.
a. Flagellum of second pair of antenna' with fourteen to sixteen joints.b. Propodus of prehensile legs with two io four spines,c. First thoracic segment with antero-lateral angles produced hornlike at sidesof head. Frontal margin of head produced. 8i)ot8 wanting on fourth andfifth abdominal segments and base of terminal segment.10. liooinela cornuia Kicbardson.c'. First thoracic segment normal. Frontal margin of head not produced.Spots present on fourth and fifth abdominal segments and base of terminalsegment 11. Hoeiiiela belliceps (Stimpson).h' . Propodus of prehensile legs with five or six spines.12. Rocinela laticauda Hansen.a'. Flagellum of second pair of antenna': with ten to eleven joints.b. Tubercles developed on all the segments of the body.l.S. liocincla tuberculosa Richardson.b' , No tubercles developed on body. Teruiinal segment of body ornamented witha very wide crescentiform band, from whose posterior border three largehastiform stripes project backwards.14. Bocitiehi aries Schicedte and Meinert.
IO. ROCINELA CORNUTA Richardson.Rocinela cornuia Riciiardsox, Proc. Am. Phil. Soc, XXXVII, 1898, p. 12, figs. 1, 2.Habitat.?Off Shumagin Bank, Alaska.
II. ROCINELA BELLICEPS (Stimpson).JEga belliceps Stimpson, Proc. Acad. Nat. Sci. Phila.; XVI, 1864, p. 155.JEga alaskensis Lockington, Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 46.Rocinela alascensis Richardson, Proc. Am. Phil. Soc, XXXVII, 1898, p. 11.
' Schinjdte and Meinert regard Jigacijlla Dana as synonymous with JFga, andremark that Dana's specimen, by which the genus ^Egacylla was instituted was ayoung Aiga. See Naturhistorisk Tidsskrift, XII, 1879-80, p. 334. See also Liitken,Vid. Medd. Naturh. For., I'-fiO, p. 180.
^ There are no specimens of the young in the National Museum.
828 PROCEEDINGS OF THE NATIONAL MUSEUM,Habitat.?Cortes Jiauk, Califoruia, to Alaska and Bering Sea.
12. ROCINELA LATICAUDA Hansen.Rocinela laticauda Hanskn, Bull. Mas. Coiiii). Zool., XXXI, 1897, No. 5, pp. 108,109.?Richardson, Troc. Am. Phil. Soc, XXX VII, 1898, pp. 14, 1.5, figs. 5, 6.Habitat.?Off Acapulco; near Tres Marias Islands; off Mazatlan;off San Luis Obispo Bay, Califoruia; off Esteros Bay, California;Puget Sound, Washington; Uniinak Island, Alaska.
13. ROCINELA TUBERCULOSA Richardson.Rocinela tiiherciilos:a Ricfiaudson, Proc. Am, Phil. Soc, XXXVII, 1898, p. 16,fig. 10.Habitat.?Southern part of Gulf of California.
Fig. 6?Kocinela reluceps (Stimpson). X2f.
?14. ROCINELA ARIES SchicEdte and Meinert;Rocinela aries Sciikedte and Meinert, Naturhistonsk Tidsskrift, XII, 1879-80,pp. 101-403, pi. XIII, figs. 7, 8.Habitat.?Mazatlan; Lower California; Panama Bay.Family VI. CYMOTIIOID^.ANALYTICAL KEY TO THE GENERA OF CYMOTHOID^.
a. Head deeply immersed or set in the first thoracic segment, whose antero-lateralangles project forward.h. Abdomen deeply immersed.First pair of ant<>nuie more often dilated, rarely compressed. First four orfive segments of body long, snbe(]ual in length, except the first, which is alittle longer; last two or three segments abruptly shorter, very often decreas-ing gradually in length. Terminal segment of abdomen subtriangular orsemicircular, often bilobed. Body oblong 8. Mcinertia.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 829
h' . AlKlonien scarcely immersed.First i>air of anteiiiiii^ very much compressed. Segments of thorax either eciualill length or the lirHt segmcut abruptly longer than the others and the last seg-ment abruptly shorter than the others. Terminal segment of the abdomenvaryingin si/.eaudform. Hody sub-oval, more or less contorted. 9. Livoneca.a'. Head not at all immersed.b. Body relaxed. Posterior angles of first segment of body prominent or produced,very often acute; posterior angles of the following segments increasinggradually in length, the iirst of these very often scarcely prominent, theposterior ones very often produced, abruptly longer than the first. Epimcraof the lirst segments very often involuted, and extending beyond the i)oste-rior angle of the segment; posterior ones iirodiiced, acute. Sides of the firstfive segments of abdomen more or less profoundly incised 11. Netocila.b'. Body compact. Posterior angles of lirst segment of body scarcely prominent,occasionally produced, tliosci of following five segments scarcely or not at allprominent; those of seventh segment produced. Eitimeia of lirst segmentsvery often almost reaching, or not reaching by a short distance, the posteriorangle of the segment. Sides of the first segments of the abdomi^n, whole orobscurely emarginated, of the posterior ones gradually more jtiofoundlyemarginated or incised 11. Anilocra.
8. MEINERTIA Stebbing.'
15. MEINERTIA GAUDICHAUDII (Milne-Edwards).Cymothoa (imidichaudii MiLT<iK-E\yWARD8, Hist. Nat. Crnst., Ill, 1840, p. 271.Ceratolhoa rapax Heller, Keise Norara Crust., XII, p. IIG, iig. 17.Ceratothoa gaudichaiidii SciiitKDXic and Mkinekt, Naturhistorisk Tidsskrift, XIII,1881-83, pp. 335-340, pl. xiii, llgs. 11-15.Habitat.?Mazatlan. 9. LIVONECA Leach.ANALYTICAL KEY TO SPECIES OV LIVONECA.
a. Terminal segment obscurely carinated, and sides enfolded. Caudal appendagesdestitute- of accessory lamelhe. . .10. Liroueca californica Sehiindte and ISIeiiiort.a'. Terminal segment not carinated, sides not enfolded. Caudal appendages fur-nished with accessory himellic.h. Inner branch of uropoda a little longer and wider than outer branch. Terminalsegment sublinguate. Abdomen deeply set in thorax.17. lAvoncca vulgaris Stimpson.b'. Inner branch of uropoda a little longer and much narrower than outer branch.Terminal segment semicircular. Abdomen less deeply inserted in thorax.18. Livonecapanamensis Schiuidte and Meinert.
16. LIVONECA CALIFORNICA Schicedte and Meinert.Livoneca californica Schicedte and Meinert, Naturhistorisk Tidsskrift, XIV,1883-84, pp. 372-374, pl. xvi, figs. 1, 2.Habitat.?Shores of California, near San Francisco.
' Hist, of Crust., 1893, p. 345.
830 PROCEKDlNdS OF THE NATIONAL MUSEUM. vol.xxi.
17. LIVONECA VULGARIS Stimpson.Livoneca vulyaria Stimpson, .Jonrii. Jios. Soc Nat. Hist., XXII, 1857, p. 68, pi. xxii,fig. 9.?ScHKKDTK and Mkinekt, Naturhistorisk Tidsskrift, XIV, 1883-84, pp.344-349,pl. XIV, fig8. 1, 2.Habitat.?Shores of California, near San Francisco, to Santa MargaritaIsland, Lower California.18. LIVONECA PANAMENSIS Schicedte and Meinert.Livoneca panemen?is Schkedte aud Meinert, NaturhiHtorisk Tidsskrift, XIV,1883-84, pp. 349-353, pi. xiii, figs. 11, 12.Habitat.?Mazatlan; west shores of Central America; Panama.10. NEROCILA Leach.19. NEROCILA CALIFORNICA Schicedte and Meinert.Nerocila californica Schkedtk and Meinert, Naturhistorisk Tidsskrift, XIII,1881-83, pp. 72-76, pi. \', figs. 12, 13; pi. vi, figs. 1, 2.Habitat.?San Diego, California; Panama Bay.11. ANILOCRA Leach.20. ANILOCRA OCCIDENTALIS, new species.Body two and one-half times longer than broad.Head large, broader than long, one-half as broad as the first thoracicsegment, produced in front in a short, blunt process, whose anterioredge is roundly truncate. Eyes large, situated at adistance equal to almost half the width of the headapart. The first pair of antenna' are composed of eightjoints and extend to the middle of the first thoracicsegment. The second pair of antenna' are composedof nine joints and extend to tlie posterior angle of thefirst thoracic segment; they are more slender than thefirst pair of antenna;.The first thoracic segment is trisinuated on its an-terior margin, and is one and a half times longer thanthe second thoracic segment. The other segments aresubequal. The sixth and seventh segments are some-
., . what narrower than the fifth, and the seventh is a littleFig. 7.?Anilocha 'OCCIDENTALIS. > 4. narrowor than the sixth. Allthe epimera are longand narrow aud more or less rounded posteriorly;thej' extend fully to the posterior angle of their corresponding seg-ments, a character not found in any other species of the genus.The first abdominal segment is partly covered at the sides by thelast thoracic segment. The first five segments are about equal inlength and width. The terminal segment is slightly wider than long,equal in length to the other abdominal segments taken together, isimpressed at the base, and posteriorly rounded. The uropoda are
NO. 1175. ISOPODS OF THE PACIFIC COAST?lilCHARDSON. 831longer than tlie last abdominal segment. Both branches are similar inshape and size; they are oarlike, with truncately rounded extremities.The legs increase slightly in length. The basis of all tlie legs iscarinated on the inferior margin.Color a light brown, marked with numerous black dots over thewhole surface of the body, with the exception of the posterior half ofthe last abdominal segment and the inner branch of the uropoda, whichare a light clear yellow without spots. The outer branch of the uropoda,which is almost black, contrasts in a marked degree with the light innerbranch. In the caudal segment the change from the darker to the lighterhalf is graduated, making the contrast less marked.Two individuals of this species were taken ; one by the II. S. FishCommission steamer Albatross^ station 3L3S, at a depth of ID fathoms,and one by Dr. D. S. Jordan, both at Monterey Bay, California. Onewas imperfect.Type.?^o. 225(57, U.S.i^.M. Monterey Bay. Depth, 19 fathoms.When compared with A. Iwris Miers ' from Peru this species differsin the shape of the anterior portion of the head, which in A. Ucvis isnarrowed and rounded, while in ^1. occidentaUs it is truncate; in thegreater length of the first thoracic segment and the equality in lengthof the succeeding segments in A. occidentalism while in A. lawis thesixth segment is the longest, the others being of nearly equal length;in the length of the ejumera, which in .1. occidentali.s attain the posteriormargin of the corresponding segments, while with .1. Iwris they are allveiy small and somewhat spiniform in the fifth to the seventh segments;in the greater breadth i)osteriorly of the terminal segment of the bodyin A. Icevis, and in the sha])e and length of the uropoda in the twospecies, the two branches being of unequal length, lamellate in shape(the inner one the longer), and both shorter than the last segment ofthe body in A. heins, while in A. californica they are equal in length,similar in shape, oarlike, and longer than the terminal segment.Family VII. SFH..55KOMIDyE.ANALYTICAL KKY K) THK (iENEKA OF Sl'H.KKOMID.E.
a. Both exterior and interior branches of uropoda projecting.b. Terminal segment of the abdomen excavated at its extremity.. .12. Dynamene.b'. Terminal segment of abdomen entire.c. Margins of head not produced; antenn;e conspicuous; legs normal; mandi-bles with five-jointed palp 13. Sphwroma.c'. Anterior and lateral margins of head produced, concealing antenna- ; propo-dus of first and second j)air8 of legs dilated, with rellexed dactyliis; man-dibles with three-jointed palp 14. Tecttceps.a'. Only exterior branch of uropoda projecting; penultimate abdominal segment inmale generallj' produced in spine; terminal segment excavated with mediantooth 15. Ciliccea.
' Proc. Zool. Soc. London, 1877, p. 672, pi. i.x viii, fig. 6.
832 VBOCEEDINGS OF THE NATIONAL MUSEUM.12. DYNAMENE Leach.ANALYTICAL KRY TO THK Sl'ECIKS OF DYNAMENE.
a. Fioiitiil margiu of head produced in a (luadrangular process; first two joints of(iist pair of antenna', dilated 21. Djinavienc dilatata, new species.a'. Frontal margin of head not produced; Joints of first pair of antennai not dilated.b. Abdomen tuberculated. Neither branch of uropoda reaching extremity of abdo-men 22. Dijnamene tuhcrmiloaa, now siiecies.b'. Abdomen not tuberculated. Inner branch of uropoda reaching extremity ofabdomen,c. Ultimate segment of abdomen ridged. Branches of uropoda of equal length.Sinus at extremity of abdomen funnel shaped.23. Dynamene benedicti, new species.
c'. Ultimate segment of abdomen smooth. Outer branch of uropoda but littlemore than lialf as long as inner branch. Sinus at extremity of abdomensmall 24. Dynamene ylabra, new siiccies.It has been .suggested by several authors ' that Dynamene may proveto be the female of Ncvsa, but until facts cau be produced to substan-tiate this assumption, it is necessary to retain the genus Dynamene.21. DYNAMENE DILATATA, new species.Body oval; surface very granular; color yellow.Head rugose, with its anterior margiu produced in a quadrangularprocess, having a small median projection,rounded antero-lateral angles and a thickenededge. First pair of antenmc extend to theposterior margin of the head, first two jointsflattened and enlarged; first joint oblong, sec-ond joint triangular, and half as long as pre-ceding joint; third joint small, as long as sec-ond, but half as wide; flagellum six-jointed.Second pair of anteume are but little longerthan first pair and do not reach the posteriormargin of the first thoracic segment.The thoracic segments are of equal length.The epimera are square or oblong, with straightlateral margins.The penultimate abdominal segment is short,and crossed with suture lines. The terminalsegment is triangular with a small roundednotch at the apex. There are three longitudi-nal ridges on the segment, one in the medianline, and one on either side of it. The uropodaare short, not reaching the extremity of the abdomen, and regularlyrounded.The legs are slender; the first two pairs are covered with long hairs.
Fig. 8.?Dynamene dilatata.o, head and first tnoracicSEGMENT. X 13i. b, DORSALVIEW. X lOf
.
'Hesse, Ann. Sci. Nat., 5th ser., XVII, pp. 5, 6; Stebbing, Hist, of Crust., 1893,p. 361; Bate and Woetwood, British Sessile-Eyed Crust., II, p. 432.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 833and extend in an anterior direction, the other five pairs extend in a pos-terior direction.The type and only specimen was collected by Mr. Heath at MontereyBay, California, at the surface. Fo. 22508, U.S.N.M.
22. DYNAMENE TUBERCULOSA, new species.Body oblong-ovate; color, light yellow, almost white; surface of abdo-men tuberculated.Head large, much broader than long, with a wide anterior margin,broadly curving on either side of a small medianpoint. Eyes small, and situated at the extremepost-lateral angle of the head. The first pair ofantenna', composed of eight articles, reach beyondthe middle of the first thoracic segment. The sec-ond pair of antenn.T, compo.sed of twelve articles,extend to the posterior angle of the first thoracicsegment.The first segment of the thorax is one and ahalf times longer than any of the other segments,which are about equal in length. The epimera,which are distinctly marked, and roundly producedat their i)osterior angles, are much broader thanlong.The first abdominal segment is transverselycrossed by three suture lines, indicated at the sidesof the segment. Three small tubercles are situatedin a transverse line on the posterior margin of thissegment. The terminal segment is subtriangularin shape with a broad funnel-like excavation at itsextremity, formed by the infolding of the lateraledges. The anterior part of the termiiuil segmentis very convex, upon which elevation are situatedthree large tubercles in a transverse row, the cen-ter one being in the median line. At the base ofthe terminal excavation is also a small tubercle.Both branches of the uropoda are similarly shaped,being of the same width throughout their entirelength and rounded posteriorly. The outer branchis somewhat shorter than the inner brantjh; neither reach the extrem-ity of the abdomen.Individuals were found at (Jrualala, California, on llaliotis rufesceiiSjby Dr. K. E. C. Stearns; also, one specimen at Catalina Harbor, Cali-fornia, and one at Popofit" Island, Aleutian Islands, at low water, byMr. W H. Dall.Type.?'^o. 22569, U.S.KM. Popoff Island, Aleutian Islands.Proc. ]Sr. M. vol. xxi y.i
Fio. 9.?Dynamene tu-IlEKCULOSA. X 8. a,nOKSAI. VIEW; b, LAT-ERAL VIEW.
834 PBOCEEDINGS OF THE NATIONAL MUSEUM.
23. DYNAMENE BENEDICTI, new species.Body oblong, oval; surface minutely granular; color, dark gray.Head with small median point. Eyes situated post-laterally. Firstpair of antennje extend to the middle of the first thoracic segment;first joint of peduncle longest; second and third joints about equalin length; flagellum contains six joints. Second pair of antenuiieextend to the posterior margin of the second thoracicsegment; flagellum contains about eleven joints.The thoracic segments are of equal length. Theepimera are square with rounded posterior angles.The penultimate abdominal segment is crossed bysuture lines, indicative of coalesced segments. Theterminal segment is triangular, terminating posteri-orly in two teeth separated by a narrow, rounded,funnel-shaped sinus. This segment is very convex,and bears two longitudinal ridges on either side ofthe median line. The uropoda do not exceed in lengththe extremity of the terminal segment. Both branches are roundedposteriorly and are similar in shape and size.The type was collected by Mr. Heath at Monterey Bay, California, atthe surface. No. 22570, U.S.KM.
Fig. 10. ? DYNAMEiNE
, benedicti. x 13j.Last thoracic seg-ment AND ABDOMEN.
24. DYNAMENE GLABRA, new species.Bodj^ oval; surface smooth.Head small; eyes situated post-laterally. First pair of antennaeextend to the eye; first joint oblong; second joint short, half as lougas first; flagellum contains six articles. Second pair of antennae extendto the posterior margin of the first thoracic segment;flagellum contains about ten articles.Thoracic segments are snbequal; the first is a littlelonger than any of the others.The penultimate abdominal segment consists of sev-eral coalesced segments, as indicated by the suturelines. The terminal segment is triangular, with a smallmedian excavation at its extremity. The lower part ofthis segment is quite flat, the slope being gradual fromthe convex upper part or base of segment to the ex-tremity. The inner branch of the uropoda is large androunded i)osteriorly ; the outer branch is small, though similar in shape,and is much shorter than the inner branch.A number of specimens were collected by Mr. Heath at MontereyBay, California at the surface.Type.?So. 22571, U.S.I^.M.
Fig. 11.?DYNAMENEGLABRA. X 13?.Abdomen and lastTWO thoracic seg-ments.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 83513. SPH^EROMA Latreille.ANALYTICAL KEY TO THE SPECIES OF SPHyEUOMA.
a. Body widening gradually from head backwards. Thorax transversely ridgedand provided with three longitudinal rows of small tubercles. Branches ofthe uropoda very large, expanded 25. Spharovia amplicauda Stimpson.a' . Body not increasing in width. Surface of thorax smooth. Branches of theuropoda not expanded./). Extremity of abdomen produced in a rhomboid process.26. Splwroma rhomburiim, new si)ecies.b'. Extremity of abdomen not produced.c. Surface of abdomen tubercular 27. Sphwroma octoncum, new species.c'. Surface of abdomen smooth 28. Sphcerovia oregonensis Dana.25. SPHiEROMA AMPLICAUDA Stimpson.Spharoma amplicauda Stimpson, Proc. Bos. Soc. Nat. Hist.. VI, 1857, p. 89.Habitat.?Tomales Bay, California.Stebbing ' suggests that a new genus near Cycloidura may be requiredfor this species.26. SPHiEROMA RHOMBURUM, new species.Surface of body punctate; color, whitish yellow.Head small. First pair of antenme reach almost to the x)osteriormargin of the first thoracic segment. Second pairof antennfB extend quite to the posterior marginof the first thoracic segment. Eyes situated j)ost-laterally.Thoracic segments equal in length. Epimerabroad and short, extending downwards, formingan angle with the segments.First abdominal segment as long as any of the ^^^- 12. ? sph^eomathoracic segments, crossed by suture lines and ABDmrEN'!''" "" "*'surmounted by two tubercles, close together, one oneither side of the median line. Terminal segment with its extremityproduced in a process rhomboid in shape, and with sides infolded,forming a kind of funnel-like opening when seen from beneath. Atthe base of this segment are two tubercles, which are continuous withtwo longitudinal ridges in the center of the segment. These ridgesunite near the extremity, and continue as one median ridge. The uro-poda are shorter than the terminal segment; the outer branch is morelanceolate in shape; both are of equal length.Two specimens were taken at Monterey Bay, California, by Mr.Heath.Typc.?^o. 22573, U.S.N.M.This species is near S. egregium Chilton^ from Akaroa, but differs in
' Hist. Crust., 1893, p. 36-1.2 Trans. New Zealand Inst., XXIV, 1891, p. 269.
836 PROCEEDINGS OF THE NATIONAL MUSEUM.the presence of two tubercles on the first abdominal seg^nient, in thepresence of two tubercles and two longitudinal ridges uniting in asingle ridge on the terminal segment, and in the eciuality in length ofthe two branches of the uropoda.
27. SPHiEROMA OCTONCUM, new species.Body with all the thoracic segments, except the first, marked withfour conspicuous brown spots, two on either side of the median line,and with two spots on the first abdominal segment, one on either sideof the median line.Head small. First pair of antenna^ reach almost to the posterior mar-gin of the first thoracic segments. Second pair extend fully to theposterior margin of the first segment.Thoracic segments subequal. Epimera broad and extending down-ward, forming an angle with the segments.First abdominal segment with two low tubercles close together, situ-ated one on either side of the median line; terminal segment triangu-lar, with apex narrowly rounded and sidesslightly infolded, forming a small openingwhen seen from below. Six low tubercles aresituated on this segment, two in longitudinalseries on either side of the median line?thelower ones being a little farther apart thanthe upper ones?and one on either side of the
^"cui'ToT abdomTJ"''" se^es. The uropoda do not reach the extremityof the abdomen by some little distance. Theouter branch is the shorter and is broadly rounded posteriorly. Theinner branch is more pointed at the extremity.Five individuals of this species were sent by Mr. Heath from Mon-terey Bay, California.Type.?^o, 22574, U.S.N.M.
28. SPHiEROMA OREGONENSIS Dana.Spharoma oregoncnsis Dana, Proc. Acad. Nat. Sci. Phila., VII, p. 177; U. .S. Exj)l.Exp. Crust., II, p. 778, p].i>ii, fig. 4.
?
Stimp.son, Journ.Bos. Soc. Nat. Hist.,VI, 1857, p. 69.Sphm-oma olivacea Lockin(5ton, Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 45.Habitat.?Pacific Grove to Alaska.14. TECTICEPS Richardson.ANALYTICAL KEY TO THE SPECIES OK TECTICKPS.
a. Terminal segment of abdomen pointed. Outer branch of uropoda much longerthan inner branch. First pair of antenna' reach the jiosterior angle of the firstthoracic segment. Second pair reach the middle of the second thoracic seg-ment. Sixth and seventh pair of legs show a marked disproportion in thelength of the propodus 29. Tecticeps alascensia Eichardson.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 837
a'. Terminal segmeut of abdomen widely rounded. Outer branch of the uropodanot longer than inner branch. First pair of antenuie reach the posterior angleof the third thoracic segment. Second pair of antenn;i' reach the middle of thefourth thoracic segment. Sixth and seventh pairs of legs show only a gradualincrease in length 30. TecUceiis convexus, new species.
29. TECTICEPS ALASCENSIS Richardson.Tecticeps alascenaia Richakson, Proc. Biol. Soc. Washington, XI, 1S97, pp. 181-183.Habitat.?Alaska; Kamchatka.30. TECTICEPS CONVEXUS, new species.Body oval, somewhat liatteiied. Surface smooth ; color light yellowwith markings of brown.Head with the anterior margin much broader than the posterior mar-gin, produced in front but not wholly concealing the basal joints ot thefirst pair of antenna^, and somewhat raised, form-ing two small convex elevations. The anterolateralmargin is likewise produced forming an acute angu-lar i)ioJection, which extends in a lateral directionbeyond the post-lateral margin of the head. Theeyes are dorsally situated in a median trau verseline. The first pair of anteunic, with a llagellumof sixteen articles, extend to the posterior angle ofthe tliird thoracic segment.The second pair ofantenna?,with a tlagellum of thirteenarticles, extend to the mid-dle of the fourth thoracicsegment, and exceed byone joint the length of the first pair of an-tenna'. Ijoth pairs of antenna', are disposed tolie concealed under the broad epimeral platesof the thoracic segments.The thoracic segments are subequal inlength. The first segment has its antero-lateral angles produced around the anteriorportion of the head, forming a broad plate atthe side of the segment. The epimera arealmost twice as broad as long; those of thefifth segment extend downward, with tiie anterior margin straight,making the length and breadth about equal, and forming almost squareepimera; in the epimera of the sixth and seventh segments, the anteriormargins are in the same direction as the posterior margins, which extenddownward.The first segment of the abdomen has three suture lines, and its pos-terior margin is produced in two small points, one on either side of themedian line, about equidistant from it and the lateral margin of the
FlO. 14.?TECTrCEPS ALAS-CENSIS Richardson.X 2i.
Fin. 15.?Tecticeps convexus.a, HEAD. X 5J. b, ABDOMENAND LAStItHORACIC SEGMENT.X 2|.
838 PliOCEEIJINGS OF THE NATIONAL MUSEUM. vouxxi.segmeut. The terminal segment is widely rounded posteriorly. Theinner branch ot the uropoda is of nearly equal width throughout itslength and is rounded at its extremity; the outer branch is slender andsharply pointed. Both brandies are of nearly equal length and neitherextend beyond the tip of the abdomen.The first pair of legs have the i)ropodus dilated and the dactylusreflexible. The propodus is large and oval in shape. In the legs ofthe second pair the propodus is irregular in shape, sometimes dilatedwith reflexible dactylus, and sometimes simple. The legs of the otherfive pairs are similar in structure, ambulatory, and show a gradualincrease in length.A number of individuals were found at Monterey Bay, California, andsent to the U. S. National Museum by Mr. Heath, who gives the follow-ing notes of their habits:They were taken by the Chinese fishermen from a sandy sea bottom about 30 feetbelow the surface (according to the Chinese statement). These are rapid swimmersand the moment they are disturbed they roll into a ball and project the exopoditeof tlie last free segment. This is undoubtedly for protection. I have not had timeto accurately cxaniiue the position nor character of this appendage, but its sharpswordlike nature is readily recognized.Type.?No. 22572, U.S.N.M.This species differs from T. alascensis in having longer antennre andantennulai; in having a rounded terminal segment, which in that speciesis very pointed ; in having the (mter branch of the uropods as short asthe inner, which in that species is much longer; in having only a gradualincrease in tlie length of the legs, which in that species show Buchmarked disproportions in the propodus of the sixth and seventh pairs;and in the position of the eyes, which in this species are situated in themedian transverse line of the head, while in T. alascensis they are placedin the posterior half of the head.IS. CILIC^^A ^each.ANALYTICAL KKY TO THK SPECIES OK CIIIC^A.
a. Surface of body smooth.b. Terminal segment with three sinuses, one above another, the two upper open-ings heart-whapod. Terminal segment as broad as long. Outer branch of theuropoda armed with four spines, broad and flat at ui)per end, and tapering tothe extremity, which does not reach beyond the tip of the abdomen.31. Cilicwa cordata, new species.h' . Terminal segment with a large sinus, in which are placed six sharp teeth.Terminal segment nearly twice as broad as long. Out<^r branch of the uropodasmooth, slender, cylindrical, and reaching much beyond the tip of the abdo-men 32. Cilicoa caiidata tjilliana, new subspecies.a'. Surface of body densely granulated. Terminal segment with a quadrangularexcavation, in the center of which is a long tooth.33. Cilicwa (jranulosa, now species.The position of the three following species is somewhat doubtful,since they lack the spine on the penultimate abdominal segment, which i
NO. 1175. ISOPifDS OF Till': I'.ICIFIC COAST?RIVHARDSON. 839is characteristic of the genus C'diaca. It lias been noted by Stebbinj?,'by Miers,^ and by Ilaswell ' that with many siwcios of CUiava, as wellas with some of the other f^enera of the kSplia-romidic, the spine is pres-ent and develoi)ed in the males but wanting in the females. As ourthree new species agree with the generic chara(;ters of Cillcna exceptin the preseiK^e of the spines, we consider them for the present new andundescribed species of Ciliava.31. CILICiEA CORDATA, new species.Body attenuated in front; color a faint yellow, profusely markedwith a delicate pink tint.Head with the anterior margin thickened, and slightly juoduccdin front. Prominent median point triangularly shaped. Frontal mar-gin broadly lobed on either side of medianpoint. Eye situated at post-lateral angleof head. First pair of anteniuc reachbeyond the posterior margin of head; firstjoint of peduncle oblong; second joint veryshort; llagellum (contains about nine arti-cles. The second pair of anteniiii' extendto the posterior angle of the third thora(;icsegment; the Hagellum contains aboutfifteen articles.The thoracic segments are about equalin length, with the exception of the first,which is a little longer than any of theothers. The epimera are very broad anddrawn out to an apex, which is rounded.They are scarcely visible in a dorsal view,as they project downward laterally, form-ing an angle with the segments. The lastthoracic segment is furnished with lowtubercles on its posterior margin.On the first abdominal segment are fivedouble tubercles. The terminal segmentof the body has three sinuses, one aboveanother, the two upper openings beingheart-shaped. Six teeth are grouped in aseries of two each, and are placed in suchregularity as to give the ajjpearance of a triple sinus. At the base ofthe ui)per sinus is a large rounded tubercle, peaked at the top. Threedouble tubercles are also situated at the base of the abdomen. The innerbranch of the uropoda is fixed and immovable; it is broad and pointed
' Hist. CriiBt., 1893, p. 364.
''Zool. Coll. Alert, 1884, p. 308.:'Pro(;. Liiiii. Hoc. Now South Wahis, VI, jt. 183.
Ki(i. 16.?(/Ilic>I';a coudata.a, HEAD AND FIRST THORACICMENT; h, DOKSAI, VIEW. A 8.SEO-
H4() i'i;(>ci:i:ins<!s of riir. satiosm. Mt s/a m.
!t(j iU cxtroiiiily iiiid <-xIcimIh I wo tliittlH tlw; Ini^Ui of the. t<;riiiiii;il hc^-iiieiit. 'Dm*. onU'T bniricli \h Ioii^ aiwl lih'iKlci-, broixl and llatt(Mi<'(labove,, more, routi(b'<l jind l,ii|)eiiiij^ at the exti'einily, Hoiriewliiit incurved,and extejulH a litth', be.yond tlio (uid of tlie abdoirien. Its oiitci- edt^eIh (irenulato and its under Hurfaee armed with Coiir HpincsH.The je.^s are h)n^ iind HU',n(h',r, ;i,ll ;iriibiiliifory, arul with daetybisbiiin^iiiciiJate,.Two Hi)eeinienH woio colI(i(;ted iit I'opcdt lsi;ind f Ah',iili;iii IshiiMlHj byMr. W. II. Dall at low waler.Typi:.?NiK'S2r,ir,, C.H.N.M., Topoll Ishind.Another individual waH Coiind at (Jatalina JHlaiid, ('alifornia, by Dr.J. (I. ('ooper. In this Hp?',eim(Mi tlie< .si.vth thoraeie- Hej^rnont is also tuber-<;ulated. One- .sp<',(',inM',n was Ibiind by Mr. Heath at JVIonte,ie,y i'.iiy ontlui })ink eorallino at low tide, :ind is shaded with a delieiite pink. Inthis spiU'Jinen, on the seventh thora(Me se.^nient and the ])enultiniateiibdotninal se,^nient, the tubereles on either side; of the nuMlian line ol'tultereles are sinjfle instead of (h)iible.
32. CIIJC/!':A CAUOATA oil.liana, new subBpccicB.
I >ody slij(htly iitten Wilted in (V?tnt. ( loioi, iij^hl, brown with niiirkinj,^sof l>laek.Mead with anterior margin tliiei^ened and slightly prodneed. Lar^M^inediiui point, trian^^nhuly shaped, on eitlier side of which t.lie (Vonbilniart;in of t,he, liciMl is bioiidly lob(^d. I'lye sitinitedat the posterior ;i,n^le oC the head. P'irst, pair ol'anteniiie icach beyond the post,e,rior margin of thehead; first Joint of pedun<-,le, is oblong'; second Joint,veryHniall; llaMelIiun(!ont,ainHeij,'ht Joints. Thesec^ondpair of iint<',nn:e ar(^ broken in tlie specimens exandned.Tlie thoriu;ic sej^ments are about- eipial in length,
* with short but very broad epime>ra, which exteinldownward late.raJIy, formin;^ an anj^le with iMo s(^^-ments. The last sej^ment is ridt(<',<l with veiy lowtubercles on its i?ost(U'ior nuir^in.The first abdominal sej^inent has two suture lines,indi(!ative of coalesced sejifnients, and bears fivedoubhituber<'les. The termiriid sej^ment has !i, l;ii{^(! sinus inwhi(;h iire situ;it,e(l six sharp l(M'tli. At th(i base ofthe Hinus is a liir{;(i tid)erelei. Three double tuberclesai'e- also found iit the buse of t,he terminal segment. Tlui iniu'r bi'anchof the uropodii, is aftixed to the sidtrs of tlie> iilxlomen and (^xt,ends twothirds of its lonj^th; it is triangularly i)ointed at Its extremity. The<outer branch is lon^- suid slender, abnost cylindri(;al in shape, smooth,somewhiil- inciirv<r<l, :iJid extemls much beyond th(5 tip of the terminalH(^j4Uient.The le/jjs, iill ;tml)ul:it,oiy, iire sUmkIci- with da(;tyluM uniun;,'uiculat<\
Vut. 17. <'AUIA'.\C'AltllA'I'A (Ml, I, IANA. y H.
NO. 1175. ISOI'ODS OF THE I'ACIFIC COAST- It I C II A IIDSOM. 841KpociirioiiN wvvi', i\vin\\i,v\\ oil' (!jil:iliiiii Ishiiid, Ciilironiiii,Tyju.?'Si). li'J57(>, IJ.S.N.M.Tli(!.s(;Hi)(M;iiii(Mis (lidci- Cioiu (JUittau candata (Suy),' in Mh', pn^SiMUic, of8ix(liKtiin;t IcMitli witliiii tlio hImuh of tli<i teiiiiiiiiil H(!;;iiujiit, whihiiii lliatKjMi(;i(;H thcTo are but four; in the, j^rcatcr (lovclopiiicjit of tlio HpiiKj jittlM* base, of tli<'- HiiiuH, aixl in the, nicdiaii (loiihir, tubercle at, tin*, bancof tii(^ terminal sc^iiicut.33, CILICi>EA GRANULOSA, new spccicH.Surface of Imdy deuHely jfranuhited; ^ranuh^H lar^e an<l cloneto<(ctlicr.II(;a(l with anterior margin tliickcned, and produced in a Hinall medianpoint, on eitlmr Hid<iof which the niaij;in is h>l)ed. I'^yes Kituated pont-hitcrally. First pair of antenine extendto th?; posterior niar;;in of tlie lirHf, thoraci<;8<!ffrn<Mit; first Joint of j)e(luncic, oblonj;; second Joint, short. Second pail'of antcMina', extend to the posterior mar-gin of th?! thiid tiioracic sej^inent.
^rhe (irst llioracic s<'t4rn<',nt is lonj^erthan any of the foih)win^ segments, Th(iepiinera are twice as broad as lonjf.The first abdr)rninal segment is shortand bears indications of three coales<',edse^Mnents. 1'here are three transverse(ihivations on tliis s<'t(nient wlii(;h are densely covcriid witli ^ranul<!S.
'J'he <>erniinal s<*,^nient bears tliree transverse elevationH af, Jiie liase,the median one t(;rminatin^ in a spine. On its posterior margin is a(juadran^nlar excavation, with a lon^ median tooth, b(;arin^ a spine atits (;xtr<'mily. At the base of the t;ool h is a small elevation. On eitluirside of the terminal (^\(;avation, a short dislance up tin; lateral mar{^in,is u small spine. The fixed inner bran(^h of the uroitoda is small andshort; the outer bran<;U is long, blunt at the extremity, somewhatincurved, and reaches, when open, much beyond the t(;rminal Kef^inenl,The marj^ins of the t.erminal wy^uu'wi, and I he edges of the oul<'i- l)ran(;hof the uro|)oda, are pubescent.The legs an*, all simple, aml)ulatory.On(i specimen from ('crios Island, Lower- Oalifornia, was collected byMr. A. W. Anthony at a depth of 20 fathoms.Type.?No. 22im, (J.H.N.M.
V?
Km. IH, C.WM'A'.Ii <IUAN(II,f)HA. X 8,I^AMT 'I'IIOUA'K: MCriMKNT ANI> AIIDO-MKN.
iCILICiEA CAUDATA fSay).N(ma ctmdata Hay, .frjiirn. J'lii). A<;a(l., I, j). iH2.?Mii-nk-Ddwaicks, IliM),. N;it.d?H (JlllHtiKs/H, III, p. '/VJ.('ijmodocea caudata Ivkh, Proc. A<;a<l. Nat, Kci. I'liila,, 181)1, p. IKS, jtl. \ i, (i>(H.11-14.
842 I'ROCKEDINGS OF THE NATIONAL MUSEUM.Pamily VIII. SEliOLIDiE.16..SEROLIS Leach.34. SEROLIS CARINATA Lockington.Serolis carivata Lockinoton, Proo. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 36Habitat.?San Diego, California.
Fig. 19.?Serolis cabinata Lockinoton. y 8.III. VALVIFERA.ANALYTICAL KEY TO TIIK FAMILIE.S OF VALVIFKRA.
a. Body more or less broad, depressed. Legs usually nearly alike, but first threepairs sometimes with propodus dilated and dactylus rellexed.Family IX. Idoteid^e (p. 842).a'. Body narrow, scarcely depressed. Four anterior pairs of legs unlike three pos-terior pairs, and not ambulatorj^, nor strictly prehensile, directed forward,slender, ciliated, with terniinal joint minute; last three pairs are stouter,ambulatory, with terminal joint bifid Family X. Akcturid^ (p.853).Family IX. IDOTEIDJ^.ANALYTICAL KEY TO THE GENERA OF lOOTEID^C.'
a. Sides of head emarginate or cleft and laterally produced beyond eyes, which aresituated upon its dorsal surface. Three anterior pairs of legs, with pe-nultimate joint or propodus dilated and forming, with reflexible dactylus,a prehensile hand 17. Glyptonotus.a'. Sidi's of head in a dorsal view entire and not laterally produced. Eyes lateral.Legs all ambulatory; three anterior pairs with penultimate joint not ornot much dilated.b. Flagellum of second pair of antennai well developed and multiarticulate.c. Palpus of maxillipeds four-jointed. Epimera of all the segments welldeveloped and evident in a dorsal view. Abdomen^ consisting of three'segments with lateral sutures, indicative of another partially coalescentsegment 18. Idotea.
' See Miers on the Idoteidai, Journ. Linn. Soc. London, XVI, 1883, pp. 9, 19, 20.
''Including terminal segment.
^Dollfus, Feuille des Jeunes Naturalistes, 3d ser., 1895, p. 4; Sars, Crust, of Nor-way, 1897, Pts. 3, 4, p. 79.
NO.H75. JSOi'ODs or I'liic I'Mifh; <',().isr-^i!icii.[i;i)S<)\. 84.')
<?'
. I'iiljMiH of iii:i\ilIi|i(;(lH not, roiir-joiiil.iul. AImIomkui (^oiihIsI iiifr of oiio Hi'^riiiiMif,,iitiiiirticiiIiiLe.d. Maxillii)o<lH witli ii tliroo-jointod jMilp. All the opiiiiitru coulcHcud iiiiilpoiloctly unitcMl vviUi tlio Hcj^iiioiitH IJ). Sijvidolrd.d'. M.ixillipodH wiUi a tvvo-joiiitcd piilp. Mpiiiw lii oCKucond, tliird, .-iiid fomtliHo^^iiiciitH <',oiil()Hc(!(l :iii<l pcrd'ctly imiUMl with tlio Hcgm?iitH; tlioHti of tlu!fifth, Hixth, uiid HOV(;iith HegiiioutH dJHtiiict .-uid w<dl dovolujtt-.^l.20. ('olidolca, new jjdiiiiH.//. Flagolliim of Mocond pairof aiitonnii) with jointH all coiiHolidut?d iind forininga Hin^^lo pioce, or witli n.'igtdliiiii <;oiiip(m(Ml of only two or tlircc jointH.f. iSody Htnootli, lini;:ir. lOpiincra of all tho thoracic, HcgMi(;ntH distinct iiiid viH-ihlc; thoHc of Mi? Hccond, tliir<I, and lonrth Hc^nicntH Hhort and nai row
;
thoHo of tlio liftli, Hixth, and Hovcnth Hc^niontH iaij^o and Itroad. I'alp ofinaxilliitcdH two- join ted 21. Clean tin.c'. JJody Hniooth, ovate. Kpirrmra of Hocond, third, fourth, and fifth thorafiicHdf^incntH (ioalcHcod with Hc^^niontH; thoso of Hixth and scvunth Hc;(ni(!ntHdi.stinct and viHihlc. ral|) of iii:ixillip?dH throu-jointcd. JointH of Ihi^id-luin all conHolidalcd and forniin^r a, Hinglopioco. 22. A'??j//n'mcj'H?, now j^?inuH.17. GLYPTONOTUS Eights.ANAKY'I'K'AI, K ICY I ?) IIIK HI'KCIKH OK (il.YI- TONOTIIH,'
a, .JointH of the podnncle of anl?!nn:i'. not <iiiatc<l ; lla^cilniii ci;;lit to foiirtRon jointed.Antfifo-laleral cervical lolien piotiiinent ',ir>. (lli/jtlonohm rnloiiion ( Liiin.i'HH).a'. .JoinlHand i)ediinc!eof antenn.c, ;^i<aMy dilated; lla>;e,llnni hovcii toei^lit jointed.Antero-laleral ccivical lohoH not prominent.. .'Mi. (Ui/iitondliiH mihinl (Krv?yer).35. GLYPTONOTUS ENTOMON (Linnaeus).OnisruH enlomon 1assa:iih, SyHt. Nat., 12th cd., IF, ITOO, ]?. lOOO.? I'ai.i.ah, Hpicil,/ool., I.\, 1772, p. r,\, pi. V, (ifTH. 1-0.(?) ICntomon pyramidal c, Klkin, licin. Hiir Ioh (JriiHta<;('H, fifjH. !-.'{.Hquilla entomon Dk Gickk, M^ini. poiuHervir a I'lliHt. dcK IiiHeetcH, VII, I77H, p. .Ml,pi. XXXII, (lf;;H. 1-10.AhMuh enlomon Omviek, Kncycl. M<jtli,, 1789, p. 'Ifi'.i.(f) Cjimothoa enlomon Vwmiuavh, Knt. Hynt., II, 179:{, p. r<0.'>,Jdolea enlomon 1J(>,S(;, lliHt. Nat. den (JriiHt., II, 1S()2, p. 17S.
?
Latukili.k, IliHt.Nat. (.'riiHt. et Iiih., VI, 1803-'!, p. m\; VII, pi. i.viii, llgH, 2, :J.? (?) La-maiujk, IliHt. dcH Aiiini. huhh Vort., Ihtcfl., V, 1818, jt. l.'jO.?(?) Dichmakkht,(Joiinid. (.'iiikI,, 182r), p. 289.?Kathkk, NeiiHte .Sdiriften <ler natiirf. (icHellHch.in Danzif,', I, 1820, j). 109, pi. i v.? Kiu^ykk, Vid. Hidnk. Skrifl,., VII, 18:{?, j).323.?MiLNK-EowAKDH, IMhI,. Nat. (.'ruHt., Ill, 1810, i?. 128.? KK0VKit, Nat.TidHHkr., II, 1847, i?. 402.-Whitk, Lint. (Jr. IJrit. Muh., 18-17, p. 93.?HuANi/r, (Jr. in Middeiidorf'H HihiriHcho ReiHe, II, 18.f>l, p. M.'i.? Mkimcut,Nut. TidHHkr., 3d Hir., XI, 1877, j). 81.? Hhandt, (JornpteM KendiiH, 1880, p.713; Ann. Maf,'. Nat. Ifint., VI, 1880, p. 98.(?) Saduria enlomon Ai>amh, in White, .Siitlnirland'H Voy. Hanin'H I'ay, etc.,Apjiendix, 18,^>2, p. ccvii.Jdoki'ffa lonf/icauda LoCKl.N(iT<)N, I'roc. (Jal. Acad. Kei., VII, 1877, I't, 1, p. 15.(iiijplonoluH enlomon Mikkh, TrunH. Linn. Soe. London, XVI, 1883, pp. 12, 13, pi,I, fiffH. 1, 2. (See MioiH for fiirtlicr Hynonyniy.)J/ahitat.?Circurn[)()hir; Went (joii.st of North AuhmU-m to I'skmHc;Grove, California.
' This key in taken from Miorn, .Jonrn. Linn. Hoe. London, XVI (1883), p. 11.
844 I'lKK'ICI'lDINdS OF rilK NATION.M, MVSKUM.
36. C.I-YPTONOTUS SABINI (Kr0ycr).IdoUm mihUii Ku^Yion, Nat. 'r'nlHskril'L, lid H(M\, II, I HI 7, p. 401 ; hihw of CniHt. in(Jiiiiniud'H Voy. <iii ScimmI., pi. xxvil, lij;. I.? K'KiNriAKDT, P'orlnf^iidlHn ovim'(irtliiliuMl'H K^(^)>s(iy^, rK'i?, Jt. IM.? liCiTKKN, LiHt, ol" OriiHt.. of (JrociilaiKl 111Airlic Maiiiiiil, IHTf), p. Ili>.?8aH8, Ar<"li. f. Math, ok Nat.iirvidoiisk, II,IH77, p. WW.(Ill Iridolima niriiahira (i. (). Saks, Archiv. f. Malii. n^ NatiirvidniiHkalt., IV, IKHO,p. W2.ahiiilonolnx Hahiiii Miicits, .lomii. Mini. Soc,., Loiiilon, XVI, IHK\, pp. I.''., Iti, pi. 1,I'lKH. ;<-;">. (Srn Mii'iH lor I'lirMirr Hyiioiiyiiiy.)llahUat.?(lircimipohir; vv?'st coiist NoiMi Anuiiica (Miri-s).\H. 1UOTI:a I'iil.iicius.
anai.y'I'H'ai. kh;v 10 iiiic hckcikh <h' iooiica.'
a. 'rtMiniiuil Hd^iiiiMil. ?MnaiKiiia(i* al. il.H iixl,r(iiiiil,y 'M. Idulm riKivalii Sl.inipHoii.?'. 'r<MiniiiJiI M<i;;iM(Mi(. not. cinarK'"'''!" "' '?'^ oxtmiiity.h. Uody nIomiUm', liiitiar. lilironn.
v.. 'r<irininal Ht'K'"""'' ''''""?"'^'* "?'' "P"" ?*^- Idoltui <inu'iUlma l>!iiia.
<)'. 'rcniiiini.l HOKiiKMifc uciil.f at its oxtii'iiiity.d. I'uHtcrn-iati'i'al uiikN^h ol' toriiiinal H<^;;IIHMI^ proiiiiiKtiit aixl Hoparatitd by utooMi IVoin KiilitriaiiKiiliir iiiiddUt portion, wiii<-li buaiH a. Hiiiall tooth attlin midtllii. !!!?. Idoha iiroloma StimpHon.(/'. l'(iHt(M'ii 1,'iti'i'iil a.n;;l<-H not/ Mrp.ii'atrd liy a t:Oot/h IVoiii niiddio portion.
?10. Idolcit reel i lined III Loi'kinnlon.h'. Mody oldon^ uvati-.('. TiMininal Hn^nxMit niKnlaily I'oninhMl, vvitli Hniall nnidiaii ])oint.II. IdoliaivoHUVHr.UHkil Hra.inlt.
v' . 'roriniiial Hd^'"""'' triaiiKnlato poNttnioriy with Hiihparallol HidoH.d. KpinuMii of Hocond, third, and fourth Ho^nxoit-H HJiort, not ri-arhinK IIirjtoHt-latdra! an^h^H of thdir rusprc^livc^ HoKim^ntH.113. Idolid Diliolciisin Itrandt.d'. lOpiinora, of all tho KOK'nonts reaching lh<i jK^t-laliiral ;inKl<'K <?f tlu^irrrHprctivti H(<Kin?ntM.
v'. Sid<'H*of thorax anunitii III. Idolni Hlniops \U\]ni<\\ci.
e'. Sidt?H of thorax nn>rr noarly p.-irallol dd. Idotra wliiUi Hihnitmm.37. IDOTEA RESKCATA Stiuipson.hlohut rmeiiila S 1 1 M rsoN, Uom. .loiirn. Nat. Ilisl., \'I, IS.^.7, p. 01, pi. xxii, lijj. 7;I'roc. Uos. Sor. Nat. IIimI,., i.sr>!>, p. SS.Miicits, .lonrn. Mnn. Soc London,XVI, ihh:{, p. I."..Ilahilat.?Straits . I uiui (h^ h^icii, opposite l^'ort TovviiscmkI, ViincouvorIsland; ( lulC of (loor^iii, Orcas Island; Pari lie (li?)V(s, San INmIio, andIMonloicy I Jay, ( /aliCornia.38. IDOTEA GRACILLIMA Dana.Idolm ijniviUima Dana, I'roc A<-ad. Nat. Hri. I'hila,., VII, IHW, p. 175.?Stimpson,lUm. .lonrn. Nat. Hint,., \l, isr.7, p. 505. Miiats, .lonrn. Linn. Soci. London,XVI, ISHli, ).. ;{;..Habitat.?Oulilbinia,.
S(Mi Miors, .lonrn. Linn. Soc. Lomlon, .X VI, ISHII, i>. 'III.
NO. ii7r.. hs(H'<H)ti OF TiiK rAcU'ja coast?hiciiajujuon. 845
39. IDOTEA UROTOMA StimpHon.
Idotni Kiotoma Stimi-hon, I'iuc. Ai-.kI. NjiI. Hci. I'liil.i., IHdl, |i. iri.'..? Miiciis,
.loiiih. l-imi. Soc. London, XVI, lHK:t, p. 111.lltihlUU.? I'lliiC^t, Soil IK I.
40. IDOTKA KICCTIIJNKATA I.uckin^.'toll.
Idotea rocMlinmla liOCKlNdiON, I'roc. (!iil. A(iiul. Hci., VII, IM77, I't.. I, |?. IKi.
?
MliciiM, .loiini. iiitiii. Hoc. London, XVI, IMHU, ji. .'M.Ilahiial.?AIoii^' Mu^ I'iicKic, coiist (Voiii 1 1 iiiiiboldl, (/oiiiily, California,to i']n.s(iiiii(lii, liowcr (Jiiiloi'iiiii.l''rom iiii (fxainiiiJitioii of Hjx'ciirM'ii.s, tlii.s HpiM-ii^.s, \vlii<'li Micih' NjiysIh Rcarccly to ho (liHtiiifjiiislicd Croiri /. (tehoUmHiH Hiaiidt, Im scon tob(i Hixiciflciilly <liHtiiic,t. It (IKTci.s I'lorn /.ocliolrnMH ill tlu'- proportions oC tlic, body,/. rectilinaaUt, be-in;;' uiorci Hlendcr?about(lv<^ tiin(5H its lon^ ;ih broad ?wliilc in /.(K-lioU'iiHiH tin', l<}n^tli i.s only Mirro and aliair tinicH ^rcatiu- tlian tli<% width; in tlio
r(;ljitiv<', length of th(i Jintcniiii' to tlic, body,an<! tlic. proportioiiH of tiic-.joints in the]>(Mhin(de oC the antcnnir, the antejinie mI. ocJiolcnHiH leae.hin^' only to lh(^ poste-rior margin of th^^ third thoiJiei<; seg-ment/ (in :ill the sp(M-Jiiiens (examined) theJoints ol' thc/ ])('diinel() bein^' shoit andst.ont, whilc/ in /. reclilinaata tlie anternne.e.xtcnd to the poslc^ior ni;ir;;in of t,lie (illhthoracic; segment, tlnijoints ol" the imdiinele/bein^ loi>^ and shMider; in the form of theii,nl,('rior margin of IJk^ heiid, the (5X<;ava-tion bein;,^ deepcir ;ind wid<M' in /. rarti-lincata Ui'.ii\ in L ochotcnHiH ; in tin* sliape of th<nirsl, thoriuJe segment,,whi(di in I .oclutlenHtH is produced laterally iitid has the anterolateraluncles l,riinciit,(^, whih*, in I . rccUliiiaild. this Hc^nient is not, prodiicc^dand has rounded antero lateral itn^les; in the si/e of the epiinersi,whi(5h :ire iniicli niori; slender in /. r/wtiiiiundo, tlnm in I .ocliolcMHiH ; andin t lui shape- of the terminal segment of the body, l,he posterior iiii^h!of which in /. oc//,o/,<.'??//< is mor(5 iicute-, tin* line from the hitj^riil an;;i(ito the- median nii^le- \n\\\\\i, (excavate?, while in /. rcvlUimnia this lim^ isstraight iiiid the mcdiiin iin;;le obtiis(>-.
I'lii. M. IliolICA ItlCO'lll.lNKAIAl.ncMNirioN. / 'I.
Jcdii II. Jiiiiii. Hoc. London, ,\ VI, ISS.'J, p. .'(1.
846 riiOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi.
41. IDOTEA WOSNESENSKII Brandt.Idoiea wosnesenskii Bijandt, Midden dorf 'a Sibirischc Reise, II, 1851, Crust., p.146.
?
Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 504.
?
Spence Bate,Lord's Naturalist in British Columbia, II, 1866, p. 281.
?
Miers, Journ. Linn.Soc. London, XVI, 1883, p. 40.Idotea hirfipes Dana, Cr. U. S. Exjd. Exp., Pt. II, 18.53, p. 704, jd. xlvi, iig. 6.Jdutca oreyonensia Dana, Proc. Acad. Nat. Sci. Phila., VII, 18.54, p. 175.Idotea media (Dana?) Spence Bate, Lord's Naturalist in British Columbia, II,1866, p. 282.Habitat.?Sen of Ocliotsk and Kamchatka Sea; west coast of NorthAmerica to Monterey Bay, California.
42. IDOTEA OCHOTENSIS' Brandt.Idotea ochotenais Brandt, Middendorf's Sibirische Keise, II, 1851, Crnst., p. 145,pi. VI, fig. 33.?MiERS, Journ. Linn. Soc. London, 1883, XVI, p. 32, pi. i,figs. 8-10.Habitat.?Awaatsch Bay, Sea of Ochotsk; northwest coast of NorthAmerica to Vancouver Island (Miers).
Fig. 21.?Idotea ochotensis Brandt, x 2.
43. IDOTEA STENOPS Benedict.
Idotea sfenojis Benedict, Proc. Biol. Soc. Washington, XII, 1898, pp. 54,55.Habitat.?Monterey, California.
44. IDOTEA WHITEI Stimpson.Idotea wMtei Stimpson, Proc, Acad. Nat. Sci. Phila., 1864, p. 155.
?
Miers, Journ.Linn. Soc. London, XVI, 1883, pp. 42, 43.
'The following is quoted from Miers, .Journ. Linn. Soc. London, XVI, 1883, p. 63:
"Mr. Spence Bate (Lord's Naturalist in British Columbia, II, 1866, p. 282) referswithout any description, specimens from Esquimault Harbor, British Columbia, toIdotea stricta Dana; it is far more probable that they belong to Idotea ochotensis."
NO. 1175. ISOPODS OF THE PACIFIC COAST?BICHAEDSON. 847Habitat.?Puget Sound; Monterey Bay, California, collected by Mr.Heath.A specimen from Monterey Bay, California, agrees with Miers'sdescription of two males received from California, which he refers tothis species. It is unlike Idotea icosncsenslcii in the following points,and from an examination of a large number of individuals of I. u-osne-senslii, in which these points remain constant, it seems to demonstratethe impossibility of uniting the two species.1. "Form of epimera of second to fourth thoracic segments, whichreach quite to the posterolateral angles of these segments,2. "Epimera of the second segment are broader anteriorly, and theterminal segment more resembles tliat of I. ochotensis, being moreangulated and less rounded at the posterolateral angles."'3. The absence of hairs on the legs.The legs of I. icosnesenslcii (the males) are thickly covered with hairsand very bushy in appearance.4. The smooth margins of the epimera, which, in I. tvosnesensJcii havethickened edges. 19. SYNIDOTEA Harger.ANALYTICAL KEY TO THE SPECIES OF SYNIDOTEA.^
a. Abdomen emarginate or notched at its distal end.b. Two spines or tubercles overhanging the frontal notch.c. Spines united near the base 45. Synidotea pallida Benedict.c '. Tubercles free at base 46. Synidotea erpsa Benedict.b '. No spines or tubercles overhanging frontal notch,c. With a low ridge arising between the eyes, and interrupted on the medianline.d. Outlines of abdomen subparallel 47. Synidotea nebuloxa Benedict.d'. Outlines strongly arcuate 48. Synidotea angulata Benedict.c'. Without a ridge between the eyes.d. Outline of abdomen subtriangular.e. Front not excavated 49. Synidotea con8olidata(S>tim^Bon).e'. Front excavated .50. Synidotea bicuapida (Oyren),d'. Outlines of abdomen ronnded.
e. Length of abdomen equal to width at base.
.51. Synidotea laticauda Benedict.e'. Length of abdomen equal to one and one-half times width at base.52. Synidotea harfordi Benedict.a'. Abdomen ]?ointed.b. Undulations of body not tubercular or spiny.c. Tubercle in front of eyes not margined 53. Synidotea nodulosa (Kr^yer).c'. Tubercle on the frontal margin and forming a i)art of it.54. Synidotea Iwvia Benedict.b'. Undulations of the body tubercular and spiny,c. Four spines on the front of the head; body spinous.55. Synidotea muricata (Harford),c'. A wedge-shaped tubercle behind the frontal notch ; body tubercular.56. Synidotea picta Benedict.
' Miera, .Journ. Linn. Soc. London, XVI, 1883, pp. 42, 43.2 Benedict, Proc. Acad. Nat. Sci. Phila. (1897), p. 391.
848 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi.Mr. Adrian Bollfus in his paper on "Les IdoteidiiR des Cotes deFrance,''' has wrougly confounded iSynidotea Harger with /StenosomaLeach. Synidotea can by no means be considered a synonym of Steno-soma, as anyone who is familiar with the two genera will undoubtedlyadmit. It differs from Stenosoma in the consolidation of the epimerawith the segments. The epimera are firmly and i)erfectly united withthe segments, and the only trace or indication of a sei)aration is rep-resented in the anterior segments by a slight and almost imperceptiblenotch in the posterior margins, halfway between the lateral margin andthe median line of the body, and in the three posterior segments by avery faint line. In Stenosoma all the epimera are very distinct fromthe segments. 45. SYNIDOTEA PALLIDA Benedict.Synidotea pallida Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 396,397.Habitat.?Chirikof Island, Alaska.46. SYNIDOTEA EROSA Benedict.Synidotea erosa Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 397-399.Habitat.?Sannakh Island, Alaska.47. SYNIDOTEA NEBULOSA Benedict.Synidotea nehulosa Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 394,39.5.Habitat.?Uualaska; Kyska Harbor; Semidi Islands; UnimakIsland; Bering Sea; Kamchatka.48. SYNIDOTEA ANGULATA Benedict.Synidotea ant/iihita Benedict, Proc Acad. Nat. Sci. Phila., 1897, pp. 39.5,396.Habitat.?Oft" Cape Johnson, Washington; oft' Destruction Island,Washington; oft' Cape Flattery, Washington.
49.' SYNIDOTEA CONSOLIDATA (Stimpson).Idotca coniioUdala Htuipson, Proc. Cal. Acad. Sci., I, 18.56, p. 89; B08. .Journ. Nat.Hist., \I, 1857, p. 503.JSdotia hicnspida Mieks, .Journ. Linn. See. London, XVI, 1883, p. 6&.Synidotea consolidata Benedict, Proc. Acad. Nat. Sci. Phila., 1897, p. 393.Habitat.?Pacific Grove, California.50. SYNIDOTEA BICUSPIDA (Owen).Idoica biciiapida Owen, Crustacea of the Blossom, 1839, p. 92, pi. xxvii, fig. 6.Idotea piilchra Lockington, Proc. Cal. Acad. Sci., VII, 1877, p. 44.Idotea bivuspida MiEiis, Journ. Liun. Soc. London, XVI, 1883, \>. 06.Synidotea bicuspida Sai:s, Crust. Norwegian North Atlantic Expedition, 1885,p. 116, pi. X, figs. 24-26.?Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp.391, 392.Habitat.?West coast of Alaska and Bering Sea.
' Feuille des Jeunes Natural istes, 1895.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 849
51. SYNIDOTEA LATICAUDA Benedict.Synidotea laticauda Benedict, Proc. Acad. Nat. .Sci. Piiila., 1897, pp. 393,394.Habitat.?Sau Francisco Bay.
52. SYNIDOTEA HARFORDI Benedict.Idotea marmorata Harford, Proc. Cal. Acad. Sci., VII, 1877, i>. 117.Synidotea harfordi Benedict, Proc. Acad. Sci. Phila., 1897, p. 402.Habitat.?Magdalena Bay, Lower California.
53. SYNIDOTEA NODULOSA (Kr0yer).Idotea nodulosa Kr0yer, Naturliist. Tidssk., II, 1846, p. 100.Synidotea nodulosa Harger, Report of U. S. Commissioner of Fish aud Fisheries,1878, Pt. 6, pp. 351, 352.?Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp.398, 399.Habitat.?Dixon Entrance, north of Queen Charlotte Islands, BritishColumbia. 54. SYNIDOTEA LiEVIS Benedict.Synidotea Iwvis Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 399,400.Habitat.?Between Bristol Bay and Pribilof Islands, Alaska; BeringSea.
Fig. 22.?Maxillipeu of Colidotea rosthata (Benedict).55. SYNIDOTEA MURICATA (Harford).Idotea muricata Harford, Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 117.Synidotea muricata Benedict, Proc. Acad. Nat. Sci. Phila., 1897, p. 400.Habitat.?Icy Cape.
56. SYNIDOTEA PICTA Benedict.Synidotea picta Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 401, 402.Habitat.?Alaska aud Bering Straits.20. COLIDOTEA,' new genus.57. COLIDOTEA ROSTRATA (Benedict).Idotea rostrata Benedict, Proc. Biol. Soc. Washinjjton, XII, 1898, pp. 53, 54.Habitat.?San Pedro, California.
' See key on p. 843 for characters of genus.Proc. N. M. vol. xxi 54
850 PROCEEDINGS OF THE NATIONAL MUSEUM.21. CLEANTIS Dana.ANALYTICAL KEY TO THE SPECIES OF CLEANTIS.
a. Flagellum consolidiitod and forming a single piece. Sides of abdomen not sepa-rated by an acnte tooth from lounded posterior portion.58. Cleantis occidcntalis, new species.a'. Flagellum compost-d of three joints. Sides of al)domen separated by an acntetooth from rounded posterior portion .59. Cleantis healhii, new species.
58. CLEANTIS OCCIDENTALIS, new species.Body narrow, elongate; surface smooth.Head of same width as tlioracic segments, and with a small, mediananterior depression. Eyes lateral. First pair of antennje consi.stiugof four joints, reaching the middle of the thirdjoint of the second pair of antenna*. Secondl^air of antenna; contain six joints (five seenfrom a dorsal view), the last joint being theflagellum.The thoracic segments show a gradual,though marked, decrease in length, the firstone being the longest and somewhat excavateon its anterior margin. The epimera of thesecond, third, and fourth segments are shortand narrow, reaching but lialf the length ofthe segments, wliile those of the last three seg-ments a re broad, with their jwsterior angles produced beyond the segments.The abdomen is composedof four segments, three shortones and the terminal seg-ment, Avhich bears suture linesindicative ofanother coalescedsegment. The terminal seg-ment is rounded i)OSteriorly.The anterior three-fourths ofthe segment is raised consid-erably above the posteriorfourth, which is flat, and thereis a groove in the median line on the posterior third ofthe anterior i^art of the segment.The legs are similar to those of the type species of thegenus. The three anterior i)airs increase in length, thethird pair being the longest, and all are directed anteriorly. The fourthpair are very short and fold across the body. The last three pairs increasein length, the seventh pair being the longest, and all these are directedposteriorly. The legs are compact and lie folded on tlie ventral side andcan not be seen from a dorsal view.
~v
^Fir;. 23.?Cleantis occidentalis.X 10.
Fig. 24. ? Maxil-i-U'ED OF Cleantisoccidentalis.Greatly enlarg eu
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON: 851There is but one specimen collected by the Albatross in 1888 atMagdalena Bay, Lower California; depth, 12 fathoms.Type.?1^0. 22578, U.S.N.M.This species, when, compared with Cleantis planicmida^ Benedict,from Pensacola, Florida, presents points of difference which areinteresting and which can easily be recognized in the manuscript quotedbelow. 59. CLEANTIS HEATHII, new species.Body slender, elongate; surface smooth.Head with lateral margins straight; anterior margin slightly exca-vate. P^yes small, lateral. First pair of antenuic consist of four Jointsand are a little longer than half the width of the head. The secondpair of antenna? are half as long as the body and are composed of nine
?CLEANTIS PLANICAUDA Benedict, new species.Body linear, densely granulated, five times longer than broad. Feet folded bcneatliout of view from above. Body lined longitudinally, by six more or less broken blacklines. Tbe lines on tbe sidi^s are more distinct than those above.Head subquadrate, partially immersed in the first thoracic segment and roundedon the posterior margin; sides parallel, anterior margin emarginate; a deepdepression or groove runs from the median notch to the center of the head. Theeyes are situated near the antero-lateral angle ; post-occipi tal lobe distinct ; antennaewith six segments; first very short and nearly immobile; second very short andstout; the third segment is equal in length to the second, but not so stout; thefourth and fifth are of equal length and about one third longer than the second andthird segments. The terminal segment or flagellum is lighter in color, and is armedwith short bristles. The length of the autenme is equal to the length of the headand first two thoracic segments. The antennube extend to the middle of the thirdsegment of the antennic. The first segment is quadrate; the second subquadrate;the third is pear-shaped; the fourth .segment is very small.The segments of the thorax are nearly equal in length and breadth, the third andfourth being but little longer than the others. The epimera of the second, third,and fourth segments are very small and can not be seen from above. On the fifth,sixth, and seventh segments the epimera are large and project well behind themargin of the segment in the form of an acute angle.The pleon is composed of four segments; the first three are very narrow; theterminal segment is elongated with subparallel sides. A marked character of thepleon is its obliquely truncated extremity. The oblique terminus is perfectly flatwith a raised margin.The feet of this species, as in the typical species described by Dana, are in twoseries. The first is composed of the first three pairs of feet, which are comparativelystout and increase in length to the third segment. The .second series begins ontbe fourth segment with a pair of short feet, which fold transversely, the otherpairs are succe.ssively longer and fold backwards. The feet of the second series aremuch more slender than those of the first. The dactyli of all are biungnlate. Thecarpal and propodal joints are spinulose beneath.The operculum is not traversed by an oblique line. The sides of the basal seg-ment are subparallel. The terminal segment is about as broad as long.Length, 15 mm. ; width, 3 mm.rijpe.?So. 22579, U.S.N.M.
852 PROCEEDINGS OF THE NATIONAL MUSEUM.joints, the three terminal ones forming tiie flagellum, which can not bedistinguished from the peduncle.Thoracic segments subequal, with narrow epimera, those of the sec-ond, third, and fourth segments reaching but hallthe length of the segments, the last three epimeraextending to the extremity of the segments.The abdomen is composed of three segments withsuture lines indicative of another. The terminal seg-ment is broadly rounded posteriorly, with small butacute lateral angles. The sides are almost parallel.The (irsfc four i)airs of legs are directed anteriorly;the last three extend in a posterior direction. Thereis no perceptible inequality in length. The dactyliare bilid.Two specimens were sent by Mr. Heath from Mon-terey Bay, California.Type.?^o. 22577, U.S.]^.M.22. EUSYMMERUS, new genus.Body elliptical. Palp of maxillipeds three-jointed.Second pair of antennae with joints of flagellum allconsolidated and forming a single piece. Eyes dor-sally situated.Lateral margins of thoracic segments expanded,edges straight and full. Epimera of second, third, fourth, and fifthsegments coalesced and firmly united with segments, those of thesixth and seventh segments distinct and visible.Abdomen composed of one segment with suture lines indicative ofanother partly coalesced segment.6o. EUSYMMERUS ANTENNATUS, new species.Body elliptical, tapering toward the extremity; surface smooth.Head three times broader than long, with the antero lateral anglesprominent. Anterior margin excavate. Lateral margins expanded.Eyes situated dorsally on the extreme lateral margin in the mediantransverse line. First pair of antenna; four jointed, short, extendingonly a little beyond the second joint of the second pair of antenna".Second pair of antennse are six-jointed, geniculate, the last or flag-ellar joint being somewhat clavate.Thoracic segments with lateral margins expanded. Lateral edgesstraight, full. ICpimera of second, third, fourth, and fifth segmentscoalesced and firmly united with the segments; epimera of sixthand seventh segments distinct and articulating with segments.Abdomen of only one segment with suture lines indicative ofanother partly coalesced segment. Abdomen i)osteriorly rounded,tapering from the base to the extremity.
Fio. 25.?CleantisIIEATHII. X 6?.
NO. 1175.- ISOPODS OF THE PACIFIC COAST-^ItlCHAIWSON. 853Legs slender, with dactyli biiinguiculate.Color of specimen brown. Lateral edges of thoracic segments col-orless.
Fig. 26.?Eusyjjmerds antennatus. X 8. FiQ. 27.?Max-ILLIPED O FECBYMMERUSANTENNATC8.One individual from off Abteojos Point, Lower California, station2835, was collected by the U, S. Fish Commission steamer Albatross;depth, 48 fathoms.Type.?^o. 22580, U.S.N.M.Family X. ARCTURIDiE.28. ARCTURUS Latreille.Flagellum of second pair of antennje more than four-jointed. Fourthsegment of thorax not greatly longer than others. Marsupium offemalecomposed of four pairs of plates. Posterior thoracic legs biunguiculate.ANALYTICAL KEY TO THE SPECIES OF AKCTURUS. 'a. End of abdomen notched, as seen from above.b. Body smooth and free from spines 61. Arcturun heringanus BeneiUct.b'. Hody spiny,c. Head and six segments of thorax each witli a pair of spines on the dorsum.Second and third articles of antenna; without spines.62. Arcturui longispinia Benedict,c'. Head and segments of thorax with not less than two pairs of spines to thesegment.d. Head with one large median spine on anterior part of head in front of eyes.63. Arciurus intermedins, new species.d'. Head with three spines on anterior i)art of head in front of eyes.64. ArcluruH murdochi Benedict.a'. End of abdomen without notch 65. Arcturua glaber Benedict.
' Dr. Benedict's key is used in part for the genus Arcturun. Proc. Biol. Soc. Wash-ington, XII (1898), pp. 42, 43.
<S54 PROCEEDINdS OF THE NATIONAL MUSEUM.
6i. ARCTURUS BERINGANUS Benedict.
Aretitrus heringanus 15exp;dict, Proc. Biol. Soc. Washington, XII, 1898, pp. 46, 47.Habitat.?Alaska j Bering Sea.62. ARCTURUS LONGISPINIS Benedict.Arcturua longispinis Benedict, Proc. Biol. 8oc. Washington, XII, 1898, pp. 44, 45.Habitat.?Aleutian Islands.63. ARCTURUS INTERMEDIUS, new species.Head, with a deep excavation on its anterior margin, the anterolateralangles being produced in a double i^rocess, the inner one rounded, theouter one acutely pointed. Near the anterior margin in the median lineis one large spine. Just backof the eyes and between themare two long spines. The lat-eral margins of the head arejjroduced in two small angula-tions with a rounded sinus be-tween, posterior to the doubleanterolateral process. On thepost-lateral margin on eitherside of the head is a small spine.The first pair of antenute aresmall and short, not reachingto the end of the second jointof the second pair of antennfe.The first joint of the secondpair of antenntb is visible andunarmed; the second joint isarmed with three spines; thethird joint is unarmed, and isabout twice as long as thesecond joint; the fourth andfifth joints are about equal inlength and areeach about twiceas long as the third; the flagellum contains three joints.The first, second, and third thoracic segments have a transverse rowof six large si^ines, three on either side of the median longitudinal line,the two center ones being the longest, although all are very long. Thefourth segment is twice as long as any of the other segments, and hasa transverse constriction on the posterior half of the segment. On theanterior portion are six spines, three on either side of the median line,the four outer ones being in a straight line, the inner two below thisline. On the posterior portion are six spines also, three on either side
Fig. 28.?Arctuhcs intermedius. x 10.
NO. 1175. ISOPODS OF THE PACIFIC COAST?EICIIAIiDSON. 855of the mediaii line. The fifth tlioracic segiiieut has twelve spines, sixon eitlier side of the median line. The sixth segment has ten spines,five on either side. The seventh and last segment has eight spines,four on either side.The abdomen is composed of two segments. The first is short, withtwelve spines, six on either side of the median line, the four inner onesbeing arranged in two longitudinal series, the two upper ones beingsmall, the two low^er ones very long. The terminal segment has theupper surface smooth. This segment terminates in two long divergentspines. There is a single spine on the lateral margin on either sidehalfway down the segment. The three anterior pairs of legs haveeach two spines on the coxal joint and one spine on the basis. Thebody increases in width from the first to the fourth segment, and thendecreases in width from the fourth to the terminal segment.One specimen from Kyska Harbor, Aleutian Islands, 10 fathoms,collected by Mr. W. H. Ball.Type.?^o. 22581, U.S.N.M.Our species differs from A. mnrdochi in the absence of spines on thethird joint of the second pair of antennie; in the greater length of thisjoint in relation to the preceding joint; in the greater length of the twofollowing joints ; in the presence of a single spine on the anterior part ofthe head, while in A. murdochi there are three, and of two spines on theposterior part, while in A. murdochi there are four; in the absence of twosmall spines just below the constriction in the fourth segment; in theabsence of the row of spines on the terminal segment of the body; andin the presence of two spines on the coxal joint and one on the basaljoint of the legs, while in A. murdochi there is but one spine on thebasal joint.This species is also distinguished from A. hystrix in the presence of asingle median spine on the anterior part of the head, while in A. hystrixthere are two, one on either side of the median line and widely sepa-rated; in the presence of two spines on the posterior part of the head,while in A. hystrix there are four; in the absence of the double row ofspines on the terminal segment of the body; and in the absence of thespine at the articulation of the third joint of the second pair of antennai.
64. ARCTURUS MURDOCHI Benedict.
Arctiiriis murdochi Benedict, Proc. Biol. See. Washington, XII, 1898, pp. 49, 50.Habitat.?Point Franklin, Alaska.
65. ARCTURUS GLABERi Benedict.Arcturua i/labrus Benedict, Proc. Biol. Soc. Washington, XII, 1898, p. 46.Habitat.?Bering Sea.
' Glabnts by error.
856 PROCEEDINGS OF THE NATIONAL MUSEUM. vouxxi.IV. ASELLOTA.ANALYTICAL KEY TO THE FAMILIES OF ASELLOTA.'
a. Lateral parts of cepbalon scarcely expanded. Eyes, when present, small, late-eral. Peduncle of inferior antenna? without small accessory appendage outsideof third joint. Legs ambulatory, except first pair, which are distinctly sub-cheliform; legs with dactylus generally uniunguiculate. First pair of pleo-poda in female very small, not operculiform. Outer lamella of second pairvery large and incrusted, so as to form, together with corresponding lamella? ofother side, a sort of operculum, covering the two succeeding pairs.Family XI. Asellidte (p. 856).a'. Lateral parts of cephalon usually lamellarly expanded. Eyes, when present,usually subdorsal. Peduncle of inferior antennie generally with small acces-sory appendage outside of third joint. Legs subequal in length with dactylusgenerally bi- or triunguiculate; first pair sometimes prehensile. First pair ofpleopoda in female transformed into a single, large opercular plate. Outerlamelhe of two succeeding pairs narrow and confiuent with basal part.Family XII. Janirid/E (p. 856).Family XI. ASELLID^.24. ASELLUS Geoffrey.Dactyli of last six pairs of periopoda uniungaiculate. Lateral mar-gins of segments produced. Eyes distinct, lateral. Mandibles strong,with a three-jointed palp. Head without rostrum.66. ASELLUS TOMALENSIS Harford.Asellus tomalensis Harford. Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, pp. 54, 55.Habitat.?Tomales Bay, California.Family XII. JANIRID^.analytical key to the genera of janikid^.
a'.* Eyes dorsal. AntenuEe of first pair well developed, with multiarticulate flagel-lum. Anteuuic of second pair long, with multiarticulate flagellum, pedun-cular joints not dilated. Mandibles with a three-jointed palp, and withcutting part separated from molar part by a deep incision.i. Head without any true rostrum. First pair of antennjo extremely small withllagellum rudimentary. Second pair of antenn.c of moderate length, with-out any distinctly squaraiform appendage. First pair of legs not prehen-sile. Uropoda extremely small, branches very short, nodiform.. 25. Jccra.v. Head with prominent rostral projection, or with a comparatively small rostrum,or without rostrum. First pair of antenniB well developed ; flagellum multi-articulate. Second pair of antennte very much elongated with a well-marked scalelike appendage outside of third joint. First pair of legs pre-hensile, carpus large, subfusiform, and edged inside with spines; propodusnarrow, linear, and very movably articulated to carpus, so as to admit ofbeing bent in against it. Uropoda largely developed, with branchesslightly unequal.
> Sars, Crust, of Norway, II, 1897, Pts. 5, 6, pp. 95, 98.sidem, Pts. 5, 6, pp. 98-100, 103,104.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 857
c. Head with lateral parts produced to very prominent acute lappets. Segmentsof thorax with lateral i^arts laciniate and produced. Caudal segment form-ing ou each side, at the end, a triangular expansion 2(5. lanihe.c\ Head with lateral parts not produced into lappets. Segments of thorax withlateral parts not produced, not laciniate. Caudal segment rounded, notexpanded laterally 27. Janira.a'. Eyes lateral. Antennaj of the first pair small with flagellum obsolete. An-tennfc of the second pair short, with peduncular joints dilated, rudimentaryflagellum, containing five articles, and equal in length to the width of thehead. Mandibles with a three-jointed palp, and with cutting part com-posed of five teeth 28. Joropsis.2S. J^^RA Leach.
67. JiERA ^A/AKISHIANA Spence Bate.J(era wakishiana Spence Bate, Lord's Naturalist in British Columbia, II, 1866,p.282.?C. BovALLius, Bihang till K. Sv. Vet. Akad. Handl., II, 1886, No.15, p. 49.Habitat.?Esquimault Harbor, British Columbia.26. lANTHE Bovallius.ANALYTICAL KKY TO THE SPECIES OF lANTHE.
a. Head with prominent rostrum ; lateral margins incised and produced into twoangulations. Second and third thoracic segments with epimeral lobes double.Terminal segment of body with lateral angulations and central portion acute.68. lanthe triangulata, new species.a'. Head without rostrum ; lateral margins entire and produced into one anteriorangulation. Second and third thoracic segments with epimeral lobes single.Terminal segment of body with lateral angulations and central portion bluntand rounded 69. lanthe erostrata, new species.
68. lANTHE TRIANGULATA, new species.Surface of body smooth; color yellow, marked with black dots.Head with rostrum in front equal to one-half the length of head.Anterior margin lobate, between the rostrum and the lateral angula-tions. The side of the head is produced in two angulations, the upperone extending in an oblique direction and not reaching beyond theanterior margin of the head. The first pair of antennae are not as longas the width of the head. The second i^air of antennae are longer thanthe body.The lateral margins of the first segment are produced into two angu-lations; those of the second and third into two, with the epimera pro-duced into two-lobed angulations; those of the fourth into two lobes,the small epimeral lobe or angulation between; and those of the fifth,sixth, and seventh into one large upper lobe, and one small lower lobe.The terminal segment is produced backward at tlie sides into twosharply pointed angulations, with a broad triangulate central lobebetween, to which the uropoda are attached. The uropoda are longer
858 PROCEEDINGS OF THE NATIONAL MUSEUM.than the terminal segment, tbe outer branch somewhat shorter than theinner one, and both fringed with hairs.First pair of legs prehensile; remaining pairs simple.
Fig. 29.?Ianthk triangclata. x 13J.Two specimens were collected by Mr. Heath at Monterey Bay,California.Type.?No. 22582. U.S.N.M.
69. lANTHE EROSTRATA, new species.Head two and a half times broader than long, with prominent antero-lateral angulations. Lateral margins produced, entire. In place of therostrum, which marks all the other known species of this genus, thereis a small median point. The eyes are dorsally situated a short dis-tance from the lateral edges. The first pair of anteunte are short, notequal to the width of the head. The second pair are broken in thespecimen examined.The first thoracic segment is produced laterally in two angulations.The second, third, and fourth segments are each produced in two angu-
ISOrODS OF THE PACIFIC COAST?IIICHABDSOX, 859latious, with a small epimeral lobe in between. The lifth, sixth, andseventh segments have each a large anterior lobe and a small posteriorepimeral lobe.The terminal segment has two bluntly triangular angulations, oneon either side of a bluntly triangular central j)ortion. The uropoda areabout as long as the caudal segment, are styliform, with branchesnearly equal. The first pair of legs are prehensile. The others aresimple, biunguiculate. One specimen was collectedat Chichagof Harbor, Attn (Aleutian Islands), byMr. W. H. Dall.lype.?Eo. 22610, TJ.S.N.M.27. JANIRA Leach.70. JANIRA OCCIDENTALIS Walker.Janira occidentalis Walker, Trans. Liverpool Biol. See,XII, 1898, pp. 280, 281, pi, xv, figs. 7-10.
Fig. 30.?Ianthe eros-TEATA. X 13i.This
Habitat.?Puget Sound, Washington.28. J^^ROPSIS Koehler.71. JiEROPSIS LOBATA, new species.Surface of body smooth.Color very peculiar and striking. The head isbrown. The first thoracic segment is perfectly white,without any markings. The second, third, and fourthsegments are brown. The fifth and sixth are white.The seventh thoracic segment and the caudal segment are brownpeculiar marking gives the body a striped appearance.Head large; front produced into a prominent triangular process, withrounded apex, very broad at the base, occupying half the anteriormargin of the head. The antero-lateral angles of the head are pro-duced in acute angles on either side to a distance equal to half thelength of the frontal process. The eyes, which are small, are situatedon the extreme lateral margins of the Lead. The first pair of antennteare extremely small, equal in length to less than half the width of thehead; flagellum obsolete. The second pair of antennae are alsoextremely short, equal in length to the width of the head, with rudi-mentary flagellum, composed of about five joints, and with peduncularjoints dilated. Mandibles have the cutting part composed of five teeth
;
palp, three-jointed.The thoracic segments are subequal in length, with lateral edgesproduced, but not laciniate, and separated from each other by lateralincisions.Caudal segment regularly rounded, with two small incisions at theplace where the uropoda are attached, between which is a rounded lobe.Uropoda are extremely small, short, nodiforiii.
860 PROCEEDINGS OF THE NATIONAL MUSEUM.Legs simple, similar in structure, with biunguical&te dactyli.Two specimens from Monterey Bay, California, were sent by Mr.Heath.Type.?No. 22583, U.S.N.M.This species is very close to Jceropais hrevicornis, but differs in thefollowing points: the coloring of the body, which in J. hrevicornis isperfectly transpar-ent and colorless,with the exception ofthe head, which ismarked with a largebrown sjiot, while inour species the headis dark, as are alsothe entire second,third, fourth, andseventh thoracic seg-
FlG. 31.?MXXILLIPPED AND MANDI-BLE OF J.T.ROPSIS LOBATA. FlO. 32.?J^EEOPSIS LO-BATA. X 20. Fig. 33.?Antennae opj^ropsis lobata.ments and the terminal abdominal segment, the other segments beingcolorless; in the shape of the terminal segment, which is perfectlyrounded in J. hrevicornis and fringed with hairs, while in our speciesthere are two posterior incisions for the reception of the uropoda, andan absence of hairs; in the larger median lobe on the anterior marginof the head; in the acuteness of the antero-lateral angles of the head,which are rounded in J. hrevicornis ; in the more angular post-lateralangles of the head, and in the more angular antero- and post-lateralangles of the thoracic segments. Other differences are noticed from acomparison of both pairs of antennae.V. ONISCOIDEA.ANALYTICAL KEY TO THE FAMILIE.S OF ONLSCOIDEA.
a. Flagellum of outer antennae not niultiarticulate. Buccal mass not very promi-nent below. First maxillc-B have two plumose set;e on the inner plate. Mandi-bles with molar expansion obsolete, without any triturating surface, it beingreplaced by brushlike recurved seta?. Maxillipeds with terminal part three-
NO. 1175. ISOFODS OF THE PA CIFIG COAST?BICHABDSON. 861
articulate; epignath large, flauking the basal part. Sexual appendage ofmale simple, and generally connected with inner rami of first pair of pleopoda.Uropoda, "with inner branch smaller than outer, and attached far in front of it.6. External antennje generally long, close together, with antennal openings large.Body scarcely able to be contracted into a ball. Head less manifestly im-mersed in first thoracic segment. Lateral parts of the head separated by avertical marginal and inframargiutil line. CTj'peus arched. Legs generallylong. Uropoda produced, reaching bej'ond the terminal segment of the abdo-men and the post-terminal segment. Terminal segment narrower than preced-ing ones and conically produced at end Family XIII. Oxiscid/E (p. 861).h'. External antennae generally short, with antennal openings small. Body ableto be contracted into a ball. Head immersed in first thoracic segment. Lateralparts of the head undifferentiated. Clypens perpendicular. Legs generallyshort. Uropoda short, not reaching beyond the epimera of the terminal seg-ment of the abdomen or the post-terminal segment. Terminal segment shortand broad Family XIV. Ahmadillidid^e (p. 86.5).a'. Flagellum of outer antenn;e multiarticulate. Buccal mass prominent. Firstmaxilhe have three plumose set? on the inner plate. Mandibles with molarexpansion large and broad, exhibitiug a finely fluted triturating surface.Maxillipeds with terminal part distinctly five-articulate; epignath short.External sexual appendages in male double. Inner ramus of first pair of pleo-poda of a similar structure in both sexes. Uropoda with both branchesstyliform Family XV. Ligiid^e (p. 865).Family XIII. ONISCID^.ANALYTICAL KEY TO THE GENERA OF OXISCID^.
a. Flagellum of external antenuai hiarticulate. External opercular ramus of thefirst, second, and rarely of the third or all the pairs of the abdominal append-ages furnished with trachea.h. Lateral lobes of the head large; frontal lobe more or less projecting. Eyessubdorsal. First two abdominal segments generally very short; three fol-lowing ones large, with large epimera. Terminal segment not reaching beyondthe epimera of preceding segment. Uropoda somewhat even; longer in malethan in female 29. rorcelUo.h'. Lateral lobes of head small, hardly projecting; frontal lobe obsolete. Eyeslateral. First two abdominal segments scarcely shorter than those following.Epimera of all the segments small. Terminal segment extending beyond theepimera of preceding segment. Uropoda subequal in both sexes.30. Metoponorthus.a'. Flagellum of external antennaj triarticulate. External opercular ramus ofabdominal appendages containing no special respiratory organ.h. Front of head produced at the middle aud at the sides in tubercles ; lateraltubercles hornlike. Epimera of abdominal segments moderate or small.31. AlloniscHs.V. Front of head not produced ; with lateral lobes. Epimera of abdominal seg-ments large 32. Lyprohim.29. PORCELLIO Latreille.ANALYTICAL KEY TO THE SPECIES OF PORCELLIO.
a. Surface of body smooth.l. Frontal median lobe of head rounded, a little produced. Articles of the flagel-lum of external antennie equal in length. Last segment of the abdomen witliits extremity widely rounded 72. Porcdlio formoaua Stuxb^rg.
862 PROCEEDINGS OF THE NATIONAL MUSEUM. vol-xxi-
1)' . Froutal median lobe of head more acute, minute. First article of the flagellumof external antennae equal in length to the other or a little longer. Last seg-ment of the abdomen with its extremity acute.. . 73. rorcellio Iwvis Latreillo.a'. Surface of body closely and roughly granulated 74. PorcelUo scaher Latreille-
72. PORCELLIO FORMOSUS Stuxberg.PorcelUo formo8U8 Stuxberg, 0fver8igt af Vetensk. Akad. Forhandl., 1875, No. 2,p. .^7.?BuDDE-LuND, Crust. Jsop. Terrestria, 1883, p. 141.Habitat?San Francisco and San Pedro, California.
73. PORCELLIO LiEVIS Latreille.PorcelUo Iwvis Latkeille, Hist. Crust. Ins., VII, p. 46; Gen. Crust., I, p. 71.?Leacii, Edinb. Encycl., VII, p. 406; Transact., XI, p. 375.Oniscits Iwrifi Lamarck, Hist. nat. an. s. vert., V, p. 154; 2d ed., V, p. 261.(?) PorcelUo Iwvis Kisso, Crust. Nice, p. 156; Hist. Nat., pp. 119, 163.?Des-MAREST, Consid., p. 321.(?) PorcelUo (Icjeerii Audouin and Savigny, Descript. de I'figypte, p. 289, pi.XIII, fig. 5.PorcelUo eucercus Brandt, Bull. Soc. Imp. d. Moscou, VI, 1833, p. 177.?Milne-Edwards, Hist. Nat. des Crust., Ill, p. 168.PorcelUo syriacus Brandt, Bull. Soc. Imp. d. Moscou, VI, 1833, p. 178.?Milne-Edwards, Hist. Nat. des Crust., Ill, p. 170.PorcelUo tnusciilus Brandt, Bull. Soc. Imp. d. Moscou, VI, 1833.PorcelUo cinerascens Brandt, Bull. Soc. Imp. d. Moscou, VI, 1833, p. 178.PorcelUo dubius Brandt, Bull. Soc. Imp. d. Moscou, VI, 18.33, p. 178.?Milne-Edwards, Hist. Nat. des Crust., Ill, p. 170.PorcelUo poeyi Guerin, Comptes Rendus, 1837, p. 132.PorcelUo Iccvis Milne-Edwards, Hist. Nat. des Crust., Ill, p. 169; Regne an.Planch, p. 71, Ms, fig. 2.PorcelUo nrlncns KoCH, Deutsch. Crust., p. 36.PorcelUo degeerii Brandt, Wagner Reise Alg., Ill, 1836, p. 278.PorcelUo oratus Zaddach., Synops., p. 13.PorcelUo flavipes Koch, Berichtig, etc., p. 206, pi. 8, fig. 97.PorcelUo degeerii Lucas, Expl. d'Alg., I, pp. 69, 139.PorcelUo Uevis Lereboullet, Mem. de la Soc. de Strasbourg, IV, p. 45, pi. i, fig. 7;pi. Ill, figs. 55-60.PorcelUo poei/i GuKRiN, Ramon de la Sagra, Crust., p. 67.
?
Saussure, Mem., p.61, pi. V, fig. 34.PorcelUo cubensin Saussure, M(?m., p. 61, pi. v, fig. 35.PorcelUo sumichrasti Saussure, Mem., p. 62, pi. v, fig. 36.PorcelUo coUllce Saussure, M(^m., p. 62, pi. v, fig. 37.PorcelUo mexicanus Saussure, Mem., p. 63, pi. v, figs. 39,40.PorcelUo azteciis Saussure, Mem., p. 63, pi. v, fig. 38.PorcelUo interrupins Heller, Verb. Zool. Bot. Gcs. Wien, XI, p. 495; NovaraExp., p. 136, pi. 12, fig. 6 (vix adult).PorcelUo Iwris Plateau, Crust. Isop., p. 10.?Budde-Lund, Nat. Tidsskrift., .3dser., VII, p. 236.PorcelUo aztecus Miers, Proc. Zool. Soc. London, 1877, p. 669.PorcelUo Iwvis Uljanin, Crust. Turkest., p. 17, pi. 4, figs. 1-10.?Budde-Lund,'Crust. Isop. Terrestria, 1885, pp. 138-141.?Hansen, Bull. Mus. Comp. Zool.Harvard College, XXXI, 1897, p. 124.
' See Budde-Lund for further synonymy.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICRABDSOX. 863Habitat.?Distribution world-wide; Colfax, California (Cook andJaquay); Monterey, California; Unalaska.
74. PORCELLIO SCABER Latreille.Oni8cu8 aseUu8 Linn.ecs, Fn. Su., p. 2058 ; Syst. Xat., I, p. 1061 ; in part.Porcellio scaler Latreille, Hist. Crust. Ins., VII, p. 45; Gen. Crust, I, p. 70.
?
Leach, Edinb. EncycL, VII, p. 406.Oniscus granulatus Lamarck, Hist. Nat. ties iiniraanx sans vertebres, V, j). 154; 2ded., v., p. 261.Porcellio scaber Risso, Crust, de Nice, jj. 155; Hist. Crust., p. 119.Porcellio ni(/ra Say, .Tourn. Phil. Acad., I, p. 432.Porcellio granulatiia Brebissox, Mem. Soc. Calv., 1825, p. 261.Porcellio scaber Desmarest, Consid. Crust., p, 321.
?
Brandt and Ratzeburg,Med. Zool., II., p. 77, pi. 12, figs. 1-i and A-B.
?
Brandt, Consp., p. 14 (Bull.Soc. Imp. d. Naturalistes de Mo8cou,VI, 1833).Porcellio hrandtxi Milne-Edwards, Hist. Nat. des Crust., Ill, p. 168.Porcellio granulatus Milne-Edwards, Hist. Nat. des Crust., Ill, p. 169, pi. 32,fig. 21.Porcellio scaber Milne-Edwards, Cuvier Rg. An., 1849, pi. 71-71 bis.Porcellio nif/ra Gould, Rep. Crust., p. 337.Porcellio scaber Koch, Deutschlands Crust., p. .34.Porcellio ditbins Koch, Deutschlands Crust., p. 34.Porcellio asper KocH, Berichtig, p. 207, pi. 8, fig. 98.Porcellio scaber Lereboullet, M^m. Strasb., IV, p. 34, pi. 1, figs. 4, 5; pi. 2, figs.43-47.Porcellio gemmiilatus Dana, Crust. U. S. Expl. Exp., 1853, ji. 725, pi. 47, fig. 7.Stimpson, Journ. Bos. Soc. Nat. Hist., VI, p. 66.Philoscia tiiberculalaia Stimpson, Proc. Cal. Acad. Sci., I, p. 89.Porcellio acabei- Sill, Crust. Sieb., 1861, p. 3.
?
Bate and Westwood, Brit. Crust.,II, p. 475.Porcellio j)aulenses Heller, Xovara Exp., p. 136, pi. 12, fig. 5.Porcellio scaler Plateau, Bull. Acad. r. Belgique, 2d ser., XXIX, 1870, No. 2, p.8.?E. Brandt, Hora- Soc. Ent. Rossi, A'lII, p. 167.
?
Budde-Lund, Nat.Tidsskrift.. 3d ser., VII, p. 238; Prospectus, p. 3; Bos, Crust. Hedrioph.Nederl., pp. 38, 91.
?
Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 129-131.1Habitat.?Distribution world-wide; San Francisco, California; SanPedro, California; Pnget Sound.Budde-Lund suggests that Porcellio gemmulatus Dana differs inno wise from Porcellio scaber.'^30. METOPONORTHUS Budde-Lund.
75. METOPONORTHUS PRUINOSUS Budde-Lund.'Metojyonorthus pruinosus JiVDDE-LiViiD, Crust. Isop. Terrestria, 1885, pp. 169,170.Porcellio macnlicornis KocH, Deutschlands Crustaceen, 1840, p. 34.
?
Stuxberg,0fver8igt af Vetensk. Akad. Forhandl., 1875, No. 2, p. 55.Habitat.?California.See Budde-Lund for further synonymy.2 Crust. Isop. Terrestria, 1885, p. 131.
^ See Budde-Lund for further synonymy.
864 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi.31. ALLONISCUS Dana.ANALYTICAL KEY TO THE SPECIES OF ALLONISCUS.
a. Surface of body very densely granulated. Margins of epimera serrated.76. AUoniscus miraMlis Stnxberg.
a'. Surface of body punctate.i. Lateral processes of the head large, iiromineut.77. AUoniscus cornntus Budde-Luud.i'. Lateral processes of the head small, scarcely prominent.78. AUoniscus perconvexus Daua.76. ALLONISCUS MIRABILIS (Stuxberg).Rhinoryctes miraMlis Stuxijerg, 0fver8igt af Votensk. Akad. Forhandl,, 1875,No. 2, p. 51.AUoniscus mirabiUs Budoe-Lund, Crust. Isop. Terrestria, 1885, p. 229.Habitat.?Oalifoniia.77. ALLONISCUS CORNUTUS Budde-Lund.AUoniscus cornutus Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 228, 229.Habitat.?California.78. ALLONISCUS PERCONVEXUS Dana.AUoniscus perconvexus Dana, Proc. Acad. Nat Sci. Phila., VII, p. 176.
?
Stimp-SON, Journ. Bos. Soc. Nat. Hist., VI, p. 66.
?
Budde-Lund, Crust. Isop. Ter-restria, 1885, p. 225.(f) AUoniscus maculosua Hakfokd, Proc. Cal. Acad. Sci., Pt. 1, VII, 1877, p. 54-
FlG. 34. ? ALLONISCUS PERCONVEXUS DANA. X 8.
^?&ito/.?California; Pacific Grove : Santa Barbara; Monterey Bay,collected by Mr. Heath; Tillamook Head, Oregon.32. LYPROBIUS Budde-Lund.79. LYPROBIUS PUSILLUS Budde-Lund.LyproMus pusiUus Budde-Lund, Crust. Isop. Terrestria, 1885, p. 230.Habitat.?California.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 865Family XIV. ARMADILLIDIDJE.33. CUBARIS Brandt.Outer branch of the uropoda small or minute, rather smooth. Ter-minal segment not shorter than uropoda. Terminal segment i)0ste-riorly truncate. Clypeus very short, with the superior margin entire,lobated at the sides. Terminal abdominal segment subtetragonal.External branch of the uropoda inserted in the middle of the internallateral margin of the basal joint.ANALYTICAL KEY TO THE SPECIES OF CUBARIS.
>
a. Lastabdominalsegmeiit longer than broad. 80. Cubans californica {BwAdm-ljXLnA)
.
a'. Last abdominal segment a little transverse, with median constriction. Antennieminntely roughened 81. Cubaris affinis (Dana).80. CUBARIS CALIFORNICA (Budde-Lund).Armadillo speciosus Stuxberg, 0fversigt af Vetensk. Akad. Forhandl., 1875, No.2, p. 62.Armadillo californica Budde-Lund, Crust. Isop. Terrestria., 1885, p. 40.Habitat.?OaUfornia : San Francisco and San Pedro.Budde-Lund^ remarks that perhaps this species does not differ fromCubaris affinis (Dana).8i. CUBARIS AFFINIS (Dana).S2)herillo affinis Dana, Proc. Acad. Nat. Sci. Phila., VII, 1854, p. 176.
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Stimpson,Journ. Bos. Soc. Nat. Hist., "VI, 1857, p. 65.Armadillo affinis Budde-Lund, Crust. Isop. Terrestria, 1885, p. 39.Habitat,?California. Family XV. LIGIID^.ANALYTICAL KEY TO THE GENERA OF LIGIIDzE.
a. Uropoda equal in length, styliform, often filiform. Interior mala of the man-dibles with numeroiTs pencils of hairs. Last segment of body broad, withdistinct epimeral plates. Maxillipeds with palp four to five jointed; epignathrounded 34. Ligia.a'. Uropoda unequal in length.b. Extremity of uropods furnished with two long apical bristles. Interior mala ofright mandible with three pencils of hairs, of left mandible with five pencilsof hairs. Last segment of body small and without any epimeral plates. Max-illipeds with a five-jointed palp; epignutb narrow, lingniform . . 35. Ligidium.h' . Extremity of uropods not furnished with two long apical bristles.36. Styloniscus.
' Cubaris is oldest synonym of preoccupied Armadillo (Stebbiag, Hist, of Cruet.,1893, p. 433).
-Crust. Isop. Terrestria, 1885, p. 40.Proc. N. M. vol. xxi -55
866 I'liOCEEDIXGS OF THE NATIONAL MUSEUM. vol.xxi.34. LIGIA Fabrieius.ANALYTICAL KEY TO THE SPECIES OF LIGIA.
a. External antcniiii- shorter than the hotly.b. Caudal .stylets ahout equal to half the length of body.82. Lifi'ia occideti talis Dana.b'. Caudal stylets about equal to one-fifth the length of body.83. Litjia pallasii lirandt.a'. External autennjB longer than body, or equal to length of body. Caudal styletsabout equal to two-thirds length of body 84. Hgia exotica Roux.82. LIGIA OCCIDENTALIS Dana.Ligia occidentalis Dana, U. S. Expl. Exp. Crust., II, p. 7 '2, pi. xlix, tig. 7; Proc.Acad. Nat. Sci. Phila., VH, p. 176.
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Stimpson, Bos. Journ. Nat, Hist., YI,1857, p. 66.?Harfoud, Proc. Cal. Acad. Sci., VII, 1877, p. 116.?Budde-LuND, Crust. Isop. Terrestria, 1885, p. 264.Habitat.?California: San Francisco Bay; San Diego; SacramentoRiver; Monterey Bay; Lower California.83. LIGIA PALLASII Brandt.Lif/ia paUasii Bkaxdt, Bull. Soc. Imp6r. des Natur. de Moscou, VI, 1833, p. 172.Ligia dilatata Stimpson, Boa. Journ. Nat. Hist., 1857, p. 67, pi. xxii, fig. 8.
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S. I. S.MiTn, Report of Progress of Geological Survey of Canada, 1878-79.Ligia Heptentrioualis Lockincton, Proc. Cal. Acad. Sci., VII, 1877, Pt. 1, p. 46.Ligia Hiimpsoni MiERS, Proc. Zool. Soc, 1877, p. 671 (see footnote).Ligia paUasli Budde-Lund, Crust. Isop. Terrestria, 1885, pp. 261, 262.Habitat.?Unalaska; Sitka; Tanager, Aleutian Islands; Victoria,Vancouver Island; Puget Sound; California.84. LIGIA EXOTICA Roux.Ligia exotica Roux, Crust. Mddit., p. 3, pi. xiii, fig. 9.Ligia grandis Perty, Spix. H. Martins, p. 212, pi. xl, fig, 13.Ligia gaudichaiidii Milne-Edwards, Hist. Nat. des Crust,, III, p. 157.Ligia handiniana Milne-Edwards, Hist.' Nat. des Crust,, III, p. 155.Ligia (Italica') coriacea Koch, Dentschl. Crust., p. 36; Berichtig., p. 211.Ligia gaudichaudii Dana, Exi)1. Exp., p. 741, pi. xlix, figs. 6a-h.?Nicolet, Gay,Hist. Chile, III, p. 265.Ligia handiniana Miers, Proc. Zool. Soc, 1877, p. 670.Ligia exotica Budde-Lund, Cru.st. iBop. Terrestria, 1885, pp. 266-268.Habitat.?Widely distributed ; California ; Topolobampo, Mexico (Mr.Edward Palmer). 33. LIGIDIUM Brandt.analytical key to the species of LIGIDIUM.
a. Inner process of the basal article of the nropoda three times shorter than theterminal external branch ; internal terminal branch reaching the apex of tlieexternal branch ; the two terminal hairs equal in length to the external branch.85. IJgidiinn hi/pnoriivi (Cuvier).a'. Inner process of the basal article of the uropoda four times shorter than theterminal external branch; internal terminal branch long, extending muchbeyond the apex of the external branch, being a sixth part longer; the twoterminal hairs short, ecjual in length to halt' the external branch.86. Ligidium tenue Budde-Lund.
NO. 1175. TSOPODS OF THE PACIFIC COAST?lilCHAIlDHON. 867
85. LIGIDIUM HYPNORUM (Cuvier).OniscKs hypnorum CuviEU, Journ. d'liist. nat. II, p. 19, pi. 2t).Ligidium hypnorum Budde-Llni>, Naturbistorisk Tidsskrift, 3d 8?'r., VII, 1870, p.225.
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Stuxberg, 0fver8i^t af Vetensk. Akad. Forhandl., 187.5, No. 2, j). 48.Habitat.?California (Stuxberg).
86. LIGIDIUM TENUE Budde-Lund.
IM/idinm tenue Budde-Lund, Crnst. Iso)). Teirestria, 188.5, p. 258.Habitat.?Sitka Island.36. STYLONISCUS Dana.
87. STYLONISCUS GRACILIS Dana.
StyloniscHx (jracilia Dana, Prof. Acad. Nat. Sci. Phila., VII, 18.54-55, p. 17fi.
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Stimi'SON, Journ. Bos. Soc. Nat. Hist., VI, 1857, p. 66.?Budde-Lund,Crust. Isop. Terrestria, 1885, p. 271.Habitat.?California.VI. EPICARIDEA.Family XVI. BOPYKID.^^.iBody of female i)rimarily disciform, variously modified subsequentlyby retrogressive metamorpbosis ; distinctly segmented; more or lessasymmetrical, twisted now to rigbt, now to left; dorsal face flattened;bead deeply sunk in tborax and carrying in front two i)airs of rudimen-tary antenna; eyes, wbeu present, aorsal. Maxillipeds lamellar, biar-ticulate, obtecting tbe oral area below, and more frequently exhibitinga small terminal joint, and, at base, two curved lanceolate appendages.Legs, seven pairs, sometimes obsolete on one side, and all of samestructure, short, prehensile; coxal plates obsolete or distinctly defined.Incubatory plates, five pairs, more or less arching over the ventral faceof the thorax; first pair, as a rule, concealed by second and divided bya transversal fold into two segments. Abdomen more or less distinctlysegmented; i)leopoda, forming simple or double lamelke, all of the samestructure, rarely obsolete. Uropoda, when present, simple lanceolate.Male elongate, very small, symmetrical; segments of thorax distinct,those of abdomen sometimes distinct, sometimes confluent Mouth partssimide, conic; posterior autennte with flagellum four- articulate; legsof uniform structure; uropoda with inner branch shorter than outer.Parasitic on decapodous crustacea.'
' Sars, Crustacea of Norway, II, 1898, pp. 195, 196, pis xi, xii.^Bopyridie parasitic on Crangon craiu/on (liinuams), Kectocranyon lar (Owen),Nectocrangon alaskensin Kingsley, and other shrimps, have been reserved for moredetailed study.
868 rROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi.This family has not been sufficiently worked up to offer as yet anysystematic arrangement of the genera.'37. ARGKIA Dana.ANALYTICAL KEY TO THE SPECIES OF ARGEIA.
a. Head transverse. All the tlioracif branchial appendages present. All the abdom-inal appendages present 88. Argeia pugcttensis Dana.a'. Head bilobate. Thoracic branchial appendages apparently absent in some ofanterior segments. Last three pairs of abdominal appendages wanting.89. Argeia depauperata Stimi^son.
88. ARGEIA PUGETTENSIS Dana.
Argeia pugettenais Dana, U. S. Expl. Exp. Crust., II, p. 804, pi. liii, fig. 7.
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Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 71.Habitat.?Puget Sound on Crangon munita.
89. ARGEIA DEPAUPERATA Stimpson.Argeia depauperata Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 71.Habitat.?San Francisco Bay on Crangon franciscorum.38. PHYLLODURUS Stimpson
90. PHYLLODURUS ABDOMINALIS Stimpson.Phyllodurus ahdominalis Stimpson, Bos. Journ. Nat. Hist., VI, 1857, p. 71.?LocK-INGTON, Proc. Cal. Acad. Sci., VII, 1876, Pt. 1, p. 57.Habitat.?Puget Sound; Tomales Bay, California; "on the commonVpogebiaJ^ 39. BOPYROIDES Stimpson.
91. BOPYROIDES ACUTIMARGINATUS Stimpson.Bopyroides acutimarginatua Stimpson, Proc. Acad. Nat. Sci. Phila., XVI, 1864,p. 156.Habitat?Pviget Sound, on Spirontocaris brevirostris.40. PSEUDIONE Kossmann.analytical key to the species of PSEUDIONE.
a. Antenna- five-jointed. First pair of maxilhe absent. In male, eyes present;maxilljB wanting; last segment of abdomen cordate in form, being narrowanteriorly and having its hinder margin notched 92. Pseudione giardi Caiman.a'. Antenna' fonr-jointed. Maxilhe normal, present. In male, eyes wanting; max-illaj normal, present ; last segment of abdomen triangular and entire.93. Pseudione galacanihce Hansen.
1 See Hansen, Bull. Mus. Comp. ZooL, Harvard College, XXXI (1897), p. 112.
NO. 1175. ISOPODS OF THE PACIFIC COAST?RICHARDSON. 869
92. PSEUDIONE GIARDI Caiman.Pseudione giardi Calman, Ann. N. Y. Acad. Sci., XI, 1898, No. 13, pp. 274-281, pi.XXXIV, fig. 5.Habitat.?Puget Sound, on Pagurus ochotensia (Brandt).
93. PSEUDIONE GALACANTH^ Hansen.Pseudione galacantlia Hansen, Bull. Mus. Comp. Zool. Harvard College, XXXI,1897, pp. 118-120, pi. V, fig. 22i.Habitat.?Gulf of California, in branchial cavity of Galacantha dio-medece var. parvispina Faxon.41. BATHYGYGE Hansen.
94. BATHYGYGE GRANDIS Hansen.Bathygyge grandis Hansen, Ball. Mua. Comp. Zool. Harvard College, XXXI, 1897,pp. 122, 124, pi. VI, figs. 2, 2e.Habitat.?Oft" Acapulco, in branchial cavity of Glyphocrangon spinu-losa Faxon. 42. CRYPTIONE Hansen.
95. CRYPTIONE ELONGATA Hansen.Cryptione elongata Hansen, Bull. Mus. Comp. Zool. Harvard College, XXXI, 1897,pp. 112-115, pi. Ill, figs. .5, 5a ; pi. iv, figs. 1, \g.Habitat.?Near Galai)agos Islands, in branchial cavity oi Nematocar-cinus ayassizii Faxon, which occurs as far north as Acapulco, Mexico.43. PARARGEIA Hansen.
96. PARARGEIA ORNATA Hansen.Parargeia ornata Haxskn, Bull. Mns. Comp. Zool. Harvard College, XXXI, 1897,pp. 120-122, pi. \ I, figs. 1, li.Habitat.?Off Acapulco Mexico, in branchial cavity of Sclerocrangonprocax Faxon. 44. lONE Latreille.
97. lONE CORNUTA Spence Bate.lone cornuta Spenck Bate, Lord's Naturalist in British Columbia, II, 1866, p. 282.lone thoracica Heli.eh, Carcinolog. Beitrag z. Fauna der Adriat. Meeres, Verhand.Zool. Bot. Gessellscb. Wien, XV, pp. 979-984, pi. 17.lone cornuta Bate and Westwoop, Brit. Sessile-Eyed Crust., II, p. 253.
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Giardand Bonnier, Contributions a I'^tude des Bopyriens, 1887.Habitat.?Esquiiuault Plarbor, British Columbia, in branchia of Gal-lianassa longimana; Vancouver Island.