[SCIENTIFIC RESULTS OF THE PHILIPPINE CRUISE OF THE FISHERIES STEAMER"ALBATROSS," 1907-1910.?No. 33.]THE EUPHAUSIACEAN CRUSTACEANS OF THE "ALBA-TROSS" EXPEDITION TO THE PHILIPPINES.
By H. J. Hansen,0/ Copenhagen, Denmark.
INTRODUCTION.At the request of the Commissioner of Fisheries, I promised towork up the Schizopod Crustaceans and Sergestidae gathered by theUnited States Fisheries steamer Albatross during the Phihppineexpedition of 1907-1910, and the present paper, which is the firstinstalment, deals with the order Euphausiacea. Before entering onthe description of the genera and species it may be appropriate togive a brief introduction.The Schizopoda and the Sergestidae are aU free-swimming through-out life and may occur near the bottom, but are most often trulypelagic, living near the surface or in deeper layers of the ocean.Many species, especially of the order Mysidacea, inhabit shallowwater not. far from the coast; while most of the Euphausiacea andmany Sergestidse are truly oceanic. Consequently only a small num-ber of the specimens, and especially of larger forms, were taken in thetrawl or the dredge, the large majority having been secured in netswith other Plankton. Only a small portion of the animals had beensorted, but I received a large number of bottles containing Planktonsamples. From the great majority of these samples aU Schizopodaand Sergestidge were removed under my supervision, but as severalof the large bottles contained an immense number of these Crustacea,about one-third of the contents was taken out and the Schizopoda,etc., separated.As the material of the Crustacea mentioned is very large, I foundit necessary to divide it into three portions according to orders.Although the material of the Euphausiacea is larger than that of thetwo other groups, it was selected because I was sure that nearly aUspecies were known beforehand, as most of the forms of this orderhave a very wide geographical distribution, and I had worked out theSchizopoda from the Dutch Siboga expedition, which had explored anadjacent area, namely, the seas and straits in the Indian Archipelago.Proceedings U. S. National Museum, Vol. 49?No. 2129. 635
636 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49.The list on the following pages shows that the collection is a verylarge one, being preserved in more than 200 vials and bottles, andcomprising 29 species. Two of these species are new to science, butit may be pointed out that they are closely allied to weU-known species
;
and here a comparison with the Sihoga collection may be of interest.*The Sihoga collected 25 species of Euphausiacea, and only three of these(Bentheuphausia amhlyops G. O. Sars, Euphausia paragibha H. J.Hansen, and Stylocheiron insulare H. J. Hansen) are not representedin the Philippine material. Consequently this latter collection con-tains seven species not obtained b}^ the Sihoga; two of these speciesare new to science, but the five remaining species (Thysanopodapectinata Ortmann, T. cornuta Illig, Eupliausia recurva H. J. Hansen,E. hrevis H. J. Hansen, and Nematohrachion Jlexipes Ortmann) areall known from the eastern tropical Pacific as well as from theAtlantic. It may be added that all the species from the Philip-pines excepting five, namely, three species of Eupliausia (E. similisG. O. Sars, E. liemigilha H. J. Hansen, and E. sihogce H. J. Hansen),and the two species established in the present paper, are known fromthe eastern tropical Pacific or the Fiji Islands and have been dealtwith in my work on the Agassiz Schizopoda.- As aU the Philippineforms?excepting the two new species?have been mentioned ordescribed and figured either in the Sihoga work or in the paper justmentioned, I have considered it unnecessary to give references to theliterature or to deal with geographical distribution. Moreover, in apaper on the Euphausiacea of the United States National Museumrecently published,^ almost aU the species enumerated in the followingpages have been mentioned, as that Museum possessed them fromother areas.In hauls from 100 to 350 fathoms or more, frequently severalspecies were present, while hauls from near the surface generally con-tained only a few fomis or even a single species, but not infrequentlyan enormous number of specimens of one or two species. Fourspecies, namely, Thysanopoda tricuspidata Milne Edwards, Eupliausiapseudogihha Ortmann, and especially Euphausia diomedeae Ortmann,and Pseudeuphausia latifrons G. O. Sars, have not only been taken at anumber of places, but sometimes in such largo numbers that one maysafely conclude that these animals have considerable value as foodfor fishes. But it need scarcely be said that an investigation of alarge number of stomachs of various food-fishes must bo undertakenbefore it will be possible to pronounce a well-founded judgment onthe relative significance of the species of Euphausiacea as foodmaterial.
' See my report in S/fto^o-Expeditie, monograph 37, 1910.s Mem. Mus. Comp. Zool., vol. 35, No. 4, 1912.3 Proc. U.S. Nat. Mus., vol. 48, 1915, pp. 59-114.
NO. 2120. PHILIPPINE CRUSTACEANS?HANSEN. 637In the following lists I have arranged the stations according tolatitude north, beginning with the most northern locality. The areaexplored is narrow-oblong, as the distance between the northern andsouthern boundaries is about three times as great as that betweenthe western and eastern.DESCRIPTIONS OF SPECIMENS.THYSANOPODA Milne Edwards.The collection contains 6 of the 11 species hitherto known.
1. THYSANOPODA TRICUSPIDATA Milne Edwards.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?. 6 speci-mens, small or half-grown.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 1 larva.D. 5436. May 7, 1909. Off Corregidor Light, west coast ofLuzon. Lat. 14? 22' 37" N.; long. 120? 29' E. Surface. 7.03p. m. Surf. temp. 86?. 1 specimen (sublarval).D. 5120. January 21, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms.3.10 p. m. Bot. temp. 43.7?^ dens. 1.02480. 2 specimens, half-grown.D. 5288. July 22, 1908. Off Matocot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. 1 specimen(sublarval)
.
D. 5457. June 8, 1909. Off Legaspi Pomt, east coast of Luzon.Lat. 13? 12' N.; long. 123? 49' 40" E. 146 fathoms. 9.40 a. m.3 specimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?. 2specimens (sublarval).D. 5539. August 19, 1909. Off Apo Island. Lat. 9? 03' 20" N.;long. 123? 24' 45" E. Surface. 7.11 p. m. Surf. temp. 83?. 1small specimen.D. 5500. August 4, 1909. Off Macabalan Point, Mmdanao. Lat.go 37/ 45// ;^ J Iq^^ 124? 36' 45" E. 200 fathoms. 1.25 a. m.Surf. temp. 84?, bot. 53.5?. 9 specimens.D. 5544. September 6, 1909. Off Coronado Point, northernMindanao. Lat. 8? 16' 30" N.; long. 122? 26' 30" E. 600 fathoms.11.17 a. m. Bot. temp. 49.8?. 1 specimen.D. 5553. September 17, 1909. Sulade Island, anchorage. Lat.5? 51' N.; long. 120? 46' 30" E. Surface. 7.28 p. m. Surf. temp.83?. 1 specimen, very small.
638 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49.D. 5649. December 16, 1909. Off North Island, Buton Strait.Lat. 5? 36' N.; long. 122? 07' 36" E. Sm-face. 7.23 p. m. Surf,temp. 83?. 4 specimens, half-grown.D. 5600. November 7, 1909. North of Celebes. Lat. 2? 05' N.;long. 123? 52' 30" E. Surface. 7.06 p.m. Surf. temp. 82?. Largenumber of specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Surf. temp. 84?. Large number of specimens.D. 5627. November 30, 1909. Off Kayoa Island, Molucca Pas-sage. Lat. 0? 06' N.; long. 127? 26' E. 5 fathoms. 6.02 p. m.Surf. temp. 83? 2 specimens, not adult.D. 5672. December 30, 1909. Off Dongala Light, MacassarStrait. Lat. 0? 29' S.; long. 118? 51' E. Surface. 7.26 p. m.Surf. temp. 83?. About 20 specimens, half-grown.D. 5611. November 19, 1909. Off Buka Buka Island, Gulf ofTomini, Celebes. Lat. 0? 40' 30" S.; long. 121? 50' E. Surface.7.14 p. m. Surf. temp. 84?. 10 specimens (1 adult, 9 very small).D. 5633. December 2, 1909. Off Selang Point. Lat. 1? 03' S.;long. 127? 44' E. Surface. 7.14 p. m. Surf. temp. 84?. Enormousnumber of specimens.D. 5669. December 29, 1909. Off Mamuju Island, Macassar Strait.Lat. 2? 19' 30" S.; long. 118? 50' E. Surface. 7.25 p. m. Surf,temp. 84?. Numerous specimens.Without label. Immense number of specimens.Remarks.?One of the largest females, in the bottle without label,measures 26 mm. in length.
2. THYSANOPODA MONOCANTHA Ortmann.D. 5288. July 22, 1908. Off Matocot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. 1 specunen.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310fathoms. 2.58 p.m.Bot. temp. 43.4?, dens. 1.02521. 2 specimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p.m. Surf. temp. 82?. 3larvse.D. 5497. August 3, 1909. Off Bantigui Island. Lat. 9? 07' 15"N.; long. 124? 59' 30" E. 800 fathoms. 10.59 a. m. Bot. temp.52.3?. 1 specimen.D. 5129. February 5, 1908. Off western Mindanao. Lat. 7?41' 30" N.; long. 122? 01' 45" E. 100 fathoms. 2.23 p. m. Bot.temp. 57.6?. 1 specimen (older larva).
NO. 2129. PHILIPPINE CRUSTACEANS?HANSEN. 639
3. THYSANOPODA iEQUALIS H. J. Hansen,D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p.m. Bot. temp. 36.2?, dens. 1.02574.1 specimen, half-grown.D. 5457. June 8, 1909. Off Legaspi Point, east coast of Luzon.Lat. 13? 12' N.; long. 123? 49' 40" E. 146 fathoms. 9.40 a. m.3 small specimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?. 7specimens, half-grown.
4. THYSANOPODA PECTINATA Ortmann.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms.2.58 p. m. Bot. temp. 43.4?, dens. 1.02521. 1 specimen (adult male.)
5. THYSANOPODA ORIENTALIS H. J. Hansen.D. 5120. January 21, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms.3.10 p. m. Bot. temp. 43.7?, dens. 1.02480. 3 specimens.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms.2.58 p. m. Bot. temp. 43.4?, dens. 1.02521. 8 specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9.00 p. m. i specimen.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao. Lat.go 37/ 45//j;[,. long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Bot. temp. 53.5?. 5 specimens.D. 5544. September 6, 1909. Off Coronado Point, northern Min-danao. Lat. 8? 16' 30" N.; long. 122? 26' 30" E. 600 fathoms.11.17 a. m. Bot. temp. 49.8?. 1 specimen.
6. THYSANOPODA CORNUTA IlUg.D. 5471. June, 1909. Off Sialat Point Light, east coast of Luzon.Lat. 13? 34' 57" N.; long. 123? 47' 06" E. 568 fathoms. 9.17 a. m.2 specimens.Remarks.?One of the specimens, an adult female, is very large,measuring 81.5 mm. from the front margin of the carapace to theend of telson. Genus EUPHAUSIA Dana.Of this very large genus the collection contains 10 species, one ofwhich is new. 7. EUPHAUSIA DIOMEDE^ Ortmann.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117?53'E. 20fathoms. 7.23p.m. Surf. temp. 79?. ISspecimens.
640 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49.November 11, 1908. Port San Pic Quinto, China Sea. (Aboutlat. 21? N.; long. 122? E.) 5 feet. 9 a. m. 1 specimen.D. 5436. May 7, 1909. Off Corregidor Light, west coast of LuzonLat. 14? 22' 37'' N.; long. 120? 29' E. Surface. 7.03 p. mSurf. temp. 86?. 1 specimen.D. 5120. January 21, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms3.10 p. m. Bot. temp. 43.7?, dens. 1.02480. 1 specimen.D. 5288. July 22, 1908. Off Matacot Point, Luzon. Lat. 13? 4330"N.;long. 121?E. 115fathoms. 8.14a.m, Numerous specimensD. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms2.58 p. m. Bot. temp. 43.4?, dens. 1.02521. 17 specimens.D. 5176. March 24, 1908. Off Escarceo Light, Verde IslandPassagfe. Lat. 13? 35'. 15" N.; long. 120? 53' 20" E. Surface7.01 p. m. Surf. temp. 79?. About 25 specimens.D. 5456. June 7, 1909. Off Legaspi Light, east coast of LuzonLat. 13? 11' 10" N.; long. 123? 51' 52" E. 120 fathoms. 12.55 p. mImmense number of half-grown specimens.D. 5195. April 3, 1908. Off Capitancillo Island, off northernCebu Island. Lat. 10? 47' N.; long. 124? 06' 30" E. Surface7.03 p. m. Surf. temp. 84?, dens. 1.02514. About 40 specimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.long. 122? 18' 45" E. Surface. 7.17 p. m. Sarf. temp. 82?. About130 specimens.D. 5258. June 2, 1908. Off southern Panay. Lat. 10? 27' 45'N.; long. 122? 12' 30" E. Surface. 7.08 p. m. Surf. temp. 84?dens. 1.02587. 1 specimen.D. 5190. April 1, 1908. Off Pescador Island. Lat. 10? 08' 15'N.; long. 123? 16' 45" E. 250 fathoms. 4.39 p. m. Bot. temp. 63?dens. 1.02482. 3 specimens.D. 5232. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 45'N.; long. 124? 44' 06" E. Surface. 8.25 p. m. Surf. temp. 84?dens. 1.02531. 8 specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22'N.; long. 124? 45'06"E. lOOfathoms. 9.00p.m. Immense numberof specimens.D. 5234. May 7, 1908. Off Limasaua Island. Lat. 10? N.; long124? 46' 06" E. 15 fathoms. 9.42 p. m. Surf. temp. 84?, dens1.02531. 7 specimens.D. 5531. August 11, 1909. Off Balicasag Island. Lat. 9? 27' 30'N.; long. 123? 38' E. Surface. 7.49 p. m. -Surf. temp. 84?. Immense number of specimens.
NO. 2120. PHILIPPINE CRUSTACEANS?HAN.SEN. 641D. 5530. August 11, 1909. Off Balicasag Island. Lat. 9? 26' 45"N.; long. 123? 38' 30" E. Surface. 7.14 p. m. Surf. temp. 84?.Immense number of specimens.D. 5495. August 2, 1909. Off Diuata Point, between Leyte andMindanao. Lat. 9? 06' 30" N.; long. 125? 00' 20" E. 600 fathoms.1.54 p. m. Bot. temp. 52.3?. About 30 specimens.D. 5539. August 19, 1909. Off Apo Island. Lat. 9? 03' 20" N.;long. 123? 24' 45" E. Surface. 7.11 p. m. Surf. temp. 83?. 20specimens.D. 5540. August 19, 1909. Off Apo Island. Lat. 9? 03' N.;long. 123? 24' 30" E. Surface. 7.42 p. m. Surf. temp. 83?. 30specimens.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao. Lat.8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Surf. temp. 84?, bot. 53.5?. Immense number of specimens, mostlyhalf-grown.August 4, 1909. Opol, Macajalar Bay, Mindanao. (About lat.8? 37|' N.) 5-12 feet. 1 p. m. 1 specimen.D. 5544. September 6, 1909. Off Coronado Point, northern Min-danao. Lat. 8? 16' 30" N.; long. 122? 26' 30" E. 600 fathoms.11.17 a. m. Bot. temp. 49.8?. 6 specimens.D. 5600. November 7, 1909. North of Celebes. Lat. 2? 05' N.;long. 123? 52' 30" E. Surface. 7.06 p. m. Sarf . temp. 82?. About30 specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Pas-sage. Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44p. m. Surf. temp. 84?. 8 specimens.D. 5672. December 30, 1909. Off Dongala Light, MacassarStrait. Lat. 0? 29' S.; long. 118? 51' E. Surface. 7.26 p. m.Surf. temp. 83?. Immense number of specimens.D. 5611. November 19, 1909. Off Buka Buka Island, Gulf ofTomini, Celebes. Lat. 0? 40' 30" S.; long. 121? 50' E. Surface.7.14 p. m. Surf. temp. 84?. Numerous specimens.D. 5633. December 2, 1909. Off Selang Point. Lat. 1? 03' S.;long. 127? 44' E. Surface. 7.14 p. m. Surf. temp. 84?. Enor-mous number of specimens.D. 5669. December 29, 1909. Off Mamuju Island. MacassarStrait. Lat. 2? 19' 30" S.; long. 118? 50' E. Surface. 7.25 p. m.Suii. temp. 84?. Numerous specimens.D. 5649. December 16, 1909. Off North Island, Buton StraiLLat. 5? 36' S.; long. 122? 07' 36" E. Surface. 7.23 p. m. Surf,temp. 83?. Numerous specimens.Remarks.?The long list of localities shows that this species is notonly commonly distributed in the area explored, but that it is ex-tremely abundant at the surface at certain stations.81022??Proc.N.M.vol.49?15 11
642 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 40.
8. EUPHAUSIA MUTICA H. J. Hansen.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117? 53' E. 20 fathoms. 7.23 p. m. Suri. temp. 79?. 11 specimens.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 6 specimens.D. 5581. September 25, 1909. Off Bumbum Island, near DarvelBay, Borneo. Lat. 4? 30' 25" N.; long. 118? 41' 30" E. Ship atanchor. Surface. 5.55 p. m. Surf. temp. 83?. 1 specimen.D. 5600. November 7, 1909. North of Celebes. Lat. 2? 05" N.;long. 123? 52' 30" E. Surface. 7.06 p. m. Sm-f. temp. 82?. About30 specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Surf. temp. 84?. About 30 specimens.D. 5672. December 30, 1909. Off Dongala Light, MacassarStrait. Lat. 0? 29' S.; long. 118? 51' E. Surface. 7.26 p. m.Surf. temp. 83?. 19 specimens.D. 5649. December 16, 1909. Off North Island, Buton Strait.Lat. 5? 36' S.; long. 122? 07' 36" E. Surface. 7.23 p. m. Surf,temp. 83?. 17 specimens.
9. EUPHAUSIA RECURVA H. J. Hansen.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?. About 25specimens.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. About 30 specimens.
10. EUPHAUSIA BREVIS H. J. Hansen.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?. 1 specimen.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Surf. temp. 84?. 1 specimen.
n. EUPHAUSIA SIMILIS G. O. Sara.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms. 2.58p. m. Bot. temp. 43.4?, dens. 1.02521. 1 specimen.Remarks.?The specimen captured is an adult male, which is quitenormal, agreeing with the specimens captured by the Challenger andthe Swedish Antarctic Expedition.
NO. 2129. PHILIPPINE CRUSTACEANS?HANSEN. 643
12. EUPHAUSIA TENERA H. J. Hansen.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?. 14 specunens.D. 5320. November 6, 1908. Chma Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 14 specimens.D. 5288. July 22, 1908, Off Matacot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a.m. 1 specimen.D. 5456. June 7, 1909. Off Legaspi Point, east coast of Luzon.Lat. 13? 11' 10" N.; long. 123? 51' 52" E. 120 fathoms. 12.55 p.m.1 specimen.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?. About25 specimens.D. 5553. September 17, 1909. Sulade Island, anchorage. Lat.5? 51' N.; long. 120? 46' 30" E. Surface. 7.28 p.m. Surf. temp.83?. 1 specimen.D. 5600. November 7, 1909. North of Celebes. Lat. 2? 05' N.;long. 123? 52' 30" E. Surface. 7.06 p. m. Surf. temp. 82?. 6specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Surf. temp. 84?. About 25 specimens.D. 5672. December 30, 1909. Off Dongala Pomt, MacassarStrait. Lat. 0? 29' S.; long. 118? 51' E. Surface. 7.26 p.m. Surf,temp. 83?. 6 specimens.D. 5611. November 19, 1909. Off Buka Buka Island, Gulf ofTomini, Celebes. Lat. 0? 40' 30" S.; long. 121? 50' E. Surface.7.14 p. m. Surf. temp. 84?. About 30 specimens.D. 5633. December 2, 1909. Off Selang Point. Lat. 1? 03' S.;long. 127? 44' E. Surface. 7.14 p. m. Surf. temp. 84?. 4 specimens.D. 5669. December 29, 1909. Off Manuju Island, MacassarStrait. Lat. 2? 19' 30" S.; long. 118? 50' E. Surface. 7.25 p. m.Surf. temp. 84?. About 30 specimens.
13. EUPHAUSIA PSEUDOGIBBA Ortmann.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 6 specimens.D. 5120. January 21, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms.3.10 p. m. Bot. temp. 43.7?, dens. 1.02480. 6 specimens.D. 5288. July 22, 1908. Off Matacot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. About 125specimens.
644 PROCEEDINOS OF THE NATIONAL MUSEUM. vol. 49.D. 5287. July 20, 1908. Off Sombrero Island, near soiitlicniLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms. 2.58p. m. Bol. temp. 43.4?, dens. 1.02521. 8 specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9 p. m. About 20 speci-mens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf, temp, 82?. Largenumber of specimens.D. 5531. August 11, 1909. Off Balicasag Island. Lat. 9? 27' 30"N. ; long. 123? 38' E. Surface. 7.49 p. m. Surf. 84?. 2 specimens.D. 5495. August 2, 1909. Off Diuata Point, between Leyte andMindanao. Lat. 9? 06' 30" N. ; long. 125? 00' 20" E. 600 fathoms.1.54 p. m. Bot. temp. 52.3?. 1 specimen.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao.Lat. 8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25a. m. Surf. temp. 87?, bot. 53.5?. Large number of specimens.D. 5581. September 25, 1909. Off Bumbum Island, near DarvelBay, Borneo. Lat. 4? 30' 25" N.; long. 118? 41' 30" E. Ship atanchor. Surface. 5.55 p. m. Surf. temp. 83?. 1 specimen.D. 5600. November 7, 1909. North of Celebes. Lat. 2? 05' N.;long. 123? 52' 30" E. Surface. 7.06 p. m. Surf. temp. 82?. 2specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Swci. temp. 84?. 3 specimens,D. 5672. December 30, 1909. Off Dongola Light, MacassarStrait. Lat. 0? 29' S.; long. 118? 51' E. Surface. 7.26 p. m.Surf, temp, 83?. About 20 specimens,D. 5633. December 2, 1909. Off Selang Point. Lat. 1? 03' S.;long. 127? 44' E. Surface. 7.14 p. m. Surf. temp. 84?, Largenumber of specimens,D, 5669, December 29, 1909. Off Mamuju Island, MacassarStrait. Lat. 2? 19' 30" S.; long. 118? 50' E. Surface. 7.25 p.m.Surf. temp. 84?. 8 specimens.D. 5649. December 16, 1909. Off North Island, Buton Strait,Lat, 5? 36' S.; long. 122? 07' 36" E. Surface. 7.23 p. m. Surf,temp. 83?. Immense number of specimens.Bemarks.?The list shows that E. pseudogibla has been taken notonly in deeper layers of the sea but several times at the surface, andthere sometimes in large numbers.
14. EUPHAUSIA HEMIGIBBA H. J. Hansen.D. 5320. November 6, 1908. China Sea, Lat, 20? 58' N,; long,120? 03' E, 800 fathoms, 2,25 p, m, Bot! temp. 36.2?, dens.1.02574. 5 specimens.
NO. 2129. PHILIPPINE CRUSTACEANS?HANSEN. 645
IS. EUPHAUSIA SIBOCae H. J. Hansen.D. 5288. July 22, 1908. Off Matacot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. Numerousspecimens.D. 5553. September 17, 1909. Sulade Island, anchorage. Lat.5? 51' N.; long. 120? 46' 30" E. Surface. 7.28 p. m. Surf. temp.83?. 4 specimens.
16. EUPHAUSIA FALLAX, new species.Plate 83, figs. la-Id.D. 5288. July 22, 1908. Off Matacot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. About 20specimens.Type-locality.?D. 5532. August 13, 1909. Off Gigantangan Island,between Masbate and Leyte. Lat. 11? 36' 39" N.; long. 124? 13'30" E. Surface. 7.14 p. m. Surf. temp. 84?. Immense number ofspecimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?. Manysmall specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9 p. m. 7 specimens.D. 5539. August 19, 1909. Off Apo Island. Lat. 9? 03' 20" N.;long. 123? 24' 30" E. Surface. 7.11 p. m. Surf. temp. 83?. 4specimens.Description.?^This species is very similar and closely allied to E.gihhoides Ortmann, as described and figured by me.^ In reality Ihave been unable to find any specific differences between the twospecies in the shape of the frontal plate, the rostrum, the gastric area,the eyes, the antennular peduncles, etc. Third abdominal seg-ment has the dorsal middle of the hind margin a little or somewhatproduced, and this produced part is either frequently rounded, orterminates in a smaU and extremely slender spiniform process.The male copulatory organs (figs. la-Id) of first pleopods affordsome striking characters. The terminal process (p^) has the foot ofmoderate length and the heel rather short, thick, straight; theprocess beyond the foot is moderately long, seen from behind (fig. Ih)straight, moderately stout, not tapering beyond the middle, andwith the end obtuse; seen from the inner side (fig. Ic), it is somewhatcurved forward at the middle, widening from the middle (fig. Id)toward the end, which has two conspicuous incisions dividing theterminal part into three teeth; the median tooth is long, somewhatcurved, acute; the posterior tooth is smaller but at least twice as
I Mem. Mus. Conip. Zool., vol. 3j, No. i, p. 252, pi. 9, figs. 2a-2ft.
646 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 49.long as broad; the third tooth is small, triangular, shorter thanbroad. The proximal process (p^) is long and nearly regularly-curved, thickened near the base on the outer side and the terminalpart is very expanded, but this expanded part differs considerablyfrom that in E. gibhoides; that expansion, seen from the imier side(fig. Id) is vertical on the process (in E. gihhoides it is very oblique)and its anterior narrow part is narrower and much longer than inE. gibhoides. The median lobe has no protruding, acute triangle onthe proximal part of the inner margin; the distal part is broad seenfrom behind with the distal margin broadly rounded; seen fromthe inner side (fig. Ic) the lobe has the teraiinal margin long and alittle oblique, while the terminal angle is about 70?; in E. gibhoidesthe lobe has an acute, protruding tubercle on the inner margm, andthe distal part is produced into a somewhat oblong triangle with theend acute. The lateral process (p^) has the major part stronglycurved and without any accessor}^ tooth.Length of a large female, 18 mm.; of a large male, 17.5 mm.The type, a male, is Cat. No. 47890, U.S.N.M.The paratype, a female, is Cat. No. 47889, U.S.N.M.Remarks.?The differences between the distal parts of the terminaland proximal processes and the median lobe of the copulatory organsin E. faUax and those in E. gihhoides are so strong that the twospecies are well separated. Besides, E. fallax is considerably smallerthan E. gihhoides. The females of the two species are difficult toseparate; in E. gihhoides the process on third abdominal segment isalways present and at least in larger specimens stronger and moredeveloped than in E. fallax.Genus PSEUDEUPHAUSIA H.J.Hansen.Only a single species is known.
17. PSEUDEUPHAUSIA LATIFRONS G. O. Sars.January 15, 1908. Nasugbu Bay, Luzon. (About lat. 13? 55' N.)Anchorage. Surface. 7 p. m. Electric light. 1 specimen.January 21, 1908. Nasugbu Bay, Luzon. Anchorage. Surface.7.30 p. m. Large number of specimens.February 20, 1909. Taal anchorage, Balayan Bay, Luzon.(About lat. 13? 48' N., long. 120? 45' E.) Surface. 7.30 p. m.1 specimen.July 22, 1908. Varadero Bay, anchorage. Lat. 13? 40' 09" N.;long. 120? 59' 30" E. 6-15 feet. 8 p. m. Immense number ofspecimens.July 22, 1908. Varadero Harbor. 10.30-11.30 p. m. Numerousspecimens.
NO. 2129. I'HILIPPINhJ CRUSTACEANS^?HANSEN. 647July 22, 1908. Varadero Harbor. 11.30-12.30 a. m. 6 speci-mens.June 18, 1909. Lagonoy Gulf, Nato Anchorage, east coast of Lu-zon. (Near lat. 13? 37' N.) Surface. 7.30 p. m. 3 specimens.March 9, 1909. Ragay Bay, anchorage, Luzon. (About lat. 13^?N.) Surface. 7 p. m. Many specimens.March 5, 1909. Ragay Gulf, Luzon. 3 specimens.March 9, 1909. Refugio Island, Pasacao Anchorage, Ragay Gulf,Luzon. 12-30 feet. 8 a. m. Electric hght. Immense number ofspecimens.June 3, 1908. Mansalay Bay, anchorage, Mindoro. (About lat.12|? N.) Surface. 9 p. m. Numerous specimens.December 20, 1908. Bolalo Bay, Palawan Island. (About lat.11?N.) Anchorage. Surface. 8.30p.m. Electric Ught. Immensenumber of specimens.D. 5340. December 22, 1908. Off Cone Island, Melaftipaya Sound,Palawan Island. Lat. 10? 55' 51" N; long. 119? 14' 12" E. 17-22fathoms. 8.22 a. m. Surf. temp. 80?. 44 specimens.December 23, 1908. Endeavour Strait, anchorage between Bandoand Endeavour Points. (About lat. 10? 55' N.) Surface. 8 p. m.Many specimens, larva and young.December 23, 1908. Endeavour Strait. Surface. 8.30 p. m.Electric light. About 20 specimens, full-grown.D. 5125. February 3, 1908. Off Nogas Island, Panay, Sulu Sea.Lat. 10?48'N.; long. 121?48'30"E. 365fathoms. 9.41a.m. Hot.temp. 50?, dens. 1.02475. 2 specimens.D. 5352. December 30, 1908. Off Tidepole Point, Ulugan Bay,Palawan Island. Lat. 10? 04' 30" N.; long. 119? 05' E, 24 fath-oms. 6.18 a. m. Surf. temp. 81?. 23 specimens.D. 5531. August 11, 1909. Off Balicasag Island. Lat. 9? 27' 30"N.; long. 123? 38' E. Surface. 7.49 p.m. Surf. temp. 84?. 3 speci-mens.August 4, 1909. Opol, Macajalar Bay, Mindanao. (About 8? 37'N.) 5-12 feet. 1 p. m. 3 specimens.D. 5595. October 6, 1909. Zamboanga, Mindanao. Lat. 6? 54'N.; long. 122? 04' 30" E. Ship at anchor. Surface. 7.13 p. m.Sm'f. temp. 80?. 1 specimen.D. 5596. October 10, 1909. Zamboanga, Mindanao. Ship atanchor. Sm-face. 6 p. m. Surf. temp. 81?. 1 specimen.D. 5553. September 17, 1909. Sulade Island, anchorage. Lat.5? 51' N.; long. 120? 46' 30" E. Surface. 7.28 p. m. Surf. temp.83?. About 35 specimens.D. 5568. September 22, 1909. Off Smgaan Island, north of TawiTawi. Lat. 5? 45' 50" N.; long. 120? 26' E. Surface. 6.35 p. m.Surf. temp. 83?. 4 specimens.
648 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 49.February 26, 1908. Tumindao Island, anchorage, Sulu Archipel-ago. (About lat. 4?? N.) 9-15 feet. 2 specimens.D. 5588. September 28, 1909. Off Mabul Island, near Borneo.Lat. 4? 14' 20" N.; long. 118? 36' 48" E. Ship at anchor. Surface.6.10 p. m. Surf. temp. 82?. Immense number of specimens.D. 5600. November 7, 1909. North of Celebes. Lat. 2? 05' N.;long. 123? 52' 30" E. Surface. 7.06 p.m. Surf . temp. 82?. About40 specimens.November 9, 1909. Talisse Island, north of Celebes. (About lat.2? N.) 10-18 feet. 6 a. m. About 35 specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Surf. temp. 84?. 3 specimens.D. 5633. December 2, 1909. Off Selang Point. Lat. 1? 03' S.;long. 127? 44' E. Surface. 7.14 p. m. Surf. temp. 84?. About 35specimens.Remarks.?The long list of locahties shows that this small and verycharacteristic form is widely distributed in the Phihppme Archipelago
;
it is especially common in shallow water near the coast and occurssometimes in vast numbers.Genus NEMATOSCELIS G. O. Sars.Of this sharply defined genus six species have been estabhshed, threeof which are represented in the collection, which aJso includes a newspecies. 18. NEMATOSCELIS MICROPS G. O. Sars.D. 5320. November 6, 1908. Chma Sea. Lat. 20? 58' N.;long. 120? 03' E. 800 fathoms. 2.25 p.m. Bot. temp. 36.2?, dens.1.02574. 13 specimens.D. 5120. January 21, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms.3.10 p. m. Bot. temp. 43.7?, dens. 1.02480. 4 specimens.D. 5287. Jidy 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms.2.58 p.m. Bot. temp. 43.4?, dens. 1.02521. 6 specimens.
19. NEMATOSCELIS LOBATA, new species.Plate 83, figs. 2a-2/.Type-locality.?D. 5288. July 22, 1908. Off Matacot Pomt, Luzon.Lat. 13? 43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. Im-mense number of specimens.D. 5248. May 18, 1908. Off Lanang Pomt, Gulf of Davao. Lat.7? 07' 25" N.; long. 125? 40' 24" E. 18 fathoms. 10.38 a. m. Surf,temp. 83?, dens. 1.02453. 2 specimens.
NO. 2129. PHILIPPINE CRUSTACEANS?HANSEN: 649Description.?Very similar and closely allied to N. microps, but alittle more slender. Rostrum in tlie female (fig. 2a) long, moder-ately narrow, at tlie broader base not marked off from the frontalplate; in the male (fig. 26) the rostrum is acute, triangular, short,about reaching the middle of the transverse thickening between theeye-stalks, a little shorter than broad and scarcely or not markedofi^ from the frontal plate. Carapace in the adult. male with a dis-tinct marginal denticle a little from the posterior end, in the adultfemale without any denticle.Eyes decidedly smaller than in specimens of N. microps of thesame size; then- upper section is conspicuously smaller than thelower. Antennular pedimcles m the female as in N. microps, in themale not quite so thick as m this species and its lower flagellum with-out any curved basal portion. Prehensile legs nearly as in N..gracilis.The male copulatory organs of first pleopods (figs. 2c-2f) showpeculiar features. The imier lobe^is obliquely rounded, with theresult that the spine-shaped process {p^) originates not only con-siderably more proximally than the terminal process {p^), but evenmore proximally than the proximal process {p^). The spine-shapedprocess {p^) is long, nearly as long as, or longer than, the proximalprocess (p^) and from a httle less to a little more than twice as long
^s the terminal process (p^), which is short, somewhat conical. Theloximal process is thick at the base and tapers to the subacute orblunt end; it is frequently curved, sometimes nearly straight. Themedian lobe (Zm) is uncommonly large, not twice as long as broad,mth the outer margin and the somewhat curved terminal marginforming together a long very arcuate line, W"hile the iimer marginis flatly convex and at its end an acute or subacute terminal angle isfound; the lateral process (p*), which is very small, is placed nearthe base of the lobe just opposite the insertion of the proximalprocess. The auxiUary lobe is somewhat short; the setiferous lobeis moderately broad, reaches distinctly beyond the median lobe,-and has only six setae.Length of a large female, 14.5 mm.; of an adult male, 12 mm.The type, a male, is Cat. No. 47SS8, U.S.N.M.The paratype a female, is Cat. No. 47889, U.S.N.MRemarJcs.^-N. lobata is smaller and more slender than N. microps,ith somewhat smaller eyes. But the male copulatory organsafford the best cliaraoters; the median lobe differs widely in shapeand size from that in N. microps or N. atlantica, the termmal processis considerably shorter than in N. microps; the inner and the medianlobes and their processes show several other peculiar featiu-es men-tioned above. All my specimens, several hundi^ed, have a peculir.r .grayish color, but I do not Icnow whether that may be due to the
650 PROCEEDINGfi OF THE NATIONAL MUSEUM. vol. 49.preservation or not. N. lohata is easily separated from N. gracilisby the shape of rostrum in both sexes and by the lower antennularflagellum and the copulatory organs in the male.
20. NEMATOSCELIS GRACILIS H. J. Hansen.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.;long. 120? 03' E. 800 fathoms. 2.25 p. m. Surf. temp. 80?, bot.temp. 36.2?, dens. 1.02574. 8 specimens.D. 5120. January 21, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms.3.10 p. m. Bot. temp. 43.7?, dens. 1.02480. 6 specimens.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 34' 40" N.; long. 120? 39' E. 310 fathoms. 2.58p. m. Bot. temp. 43.4?, dens. 1.02521. 13 specimens.D. 5233. May 7, 1908. Off Lknasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9 p. m. Large number ofspecimens.D. 5531. August 11, 1909. Off Balicasag Island. Lat. 9? 27'SO" N.; long. 123? 38' E. Surface. 7.49 p. m. Surf. temp. 84?.2 specimens.D. 5495. August 2, 1909. Off Diuata Point, between Leyte andMindanao. Lat. 9? 06' 30" N.; long. 125? 00' 20" E. 600fathoms. Smi. temp. 83?, bot. 52.3?. 2 specimens (male and female).D. 5500. August 4, 1909. Off Macabalan Point, Mindanao.Lat. 8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Surf. temp. 84?, bot. 53.5?. 11 specimens.D. 5544. September 6, 1909. Off Coronado Point, northernMndanao. Lat. 8? 16' 30" N.; long. 122? 26' 30" E. 600 fathoms.11.17 a. m. Bot. temp. 49.8?. 2 specimens.
21. NEMATOSCELIS TENELLA G. O. Bars.D. 5320. November 6, 1908. Chma Sea. Lat. 20? 58' N.;long. 120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 4 specimens.D. 5288. July 22, 1908. Off Mataoot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. 4 specimens.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms. 2.58p. m. Bot. temp. 43.4?, dens. 1.02521. 12 specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9 p. m. 1 specmien.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao.Lat. 8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Surf. temp. 84?, bot. 53.5?. 1 specimen.
NO. 2129. PHILIPPINE CRUSTACEANS?HANSEN. 651Genus NEMATOBRACHION Caiman.The collection contains two of the three species hitherto known.
22. NEMATOBRACmON BOOPIS Caiman.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long,120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 1 specimen, young.D. 5120. January 21, 1908. Off Sombrero Island, near southern.Luzon. Lat. 13? 45' 30" N.; long. 120? 30' 15" E. 350 fathoms.3.10 p. m. Bot. temp. 43.7?, dens. 1.02480. 1 specimen.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao.Lat. 8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11. 25 a. m.Surf. temp. 84?, bot. 53.5?. 3 specimens, young.
23. NEMATOBRACHION FLEXIPES Ortmaim.D. 5457. June 8, 1909. Off Legaspi Light, east coast of Luzon.Lat. 13? 12' N.; long. 123? 49' 40" E. 146 fathoms. 9.40 a. m.1 specimen.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?. 2specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9.00 p. m. 12 specimens.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao. Lat.8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Surf. temp. 84?, bot. 53.5?. 16 specimens.Genus STYLOCHEIRON G. O. Sars.The collection contains six of the nine species known,
24. STYLOCHEIRON CARINATUM G. O. Sars.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.117? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?. 2 specimens.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 6 specimens.June 18, 1909. Lagonoy Gulf, Nato Anchorage, east coast ofLuzon. (Near lat. 13? 37' N.). Surface. 7.30 p.m. 1 specimen.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?. Im-mense number of specimens.D. 5553. September 17, 1909. Sulade Island, anchorage. Lat.5? 51' N.; long. 120? 46' 30" E. Surface. 7.28 p. m. Surf. temp.83?. 5 specimens.
'652 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 49.D. 5611. November 19, 1909. Off Buka Buka Island, Gulf ofTomini, Celebes. Lat. 0? 40' 30" S.; long. 121? 50' E. Surface.7.14 p. m. Surf. temp. 84?. About 50 specimens.
25. STYLOCHEIRON LONGICORNE G. O. Sars.D. 5320. November 6, 1908. China .Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 10 specimens.D. 5288. July 22, 1908. Off Matacot Point, Luzon, Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. 3 specimens.D. 5456. June 7, 1909. Off Lagaspi Point, east coast of Luzon.Lat. 13? 11' 10" N.; long. 123? 51' 52" E. 120 fathoms. 12.55p. m. 1 specimen.D. 5233. May 7, 1908. Off Lunasaua Island. Lat. 10? 00' 22"N.; long. 124? 45' 06" E. 100 fathoms. 9 p. m. 1 specimen.D. 5500. August 4, ' 1909. Off Macabalan Point, Mindanao.Lat. 8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25 p. m.Surf. temp. 84?, bot. 53.5?. 1 specimen.
25. STYLOCHEIRON APFINE H. J. Hansen.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.; long.171? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?. 2 specimens.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.; long.120? 03' E. 800 fathoms. 2.25 p. m. Bot. temp. 36.2?, dens.1.02574. 2 specimens.D. 5287. July 20, 1908. Off Sombrero Island, near southernLuzon. Lat. 13? 37' 40" N.; long. 120? 39' E. 310 fathoms.2.58 p. m. Bot. temp. 43.4?; dens. 1.02521. 4 specunens.D. 5456. June 7, 1909. Off Lagaspi Point, east coast of Luzon.Lat. 13? 11' 10" N.; long. 123? 51' 52" E. 120 fathoms. 12.55p.m. About 40 specimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?.9 specimens. ?D. 5190. April 1, 1908. Off Pescador Island. Lat. 10? 08' 15"N.; long. 123? 16' 45" E. 250 f^ithoms. 4.39 p.m. Bot. temp.63?; dens. 1.02482. 1 specimen.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N. ; long. 124? 45' 06" E. 100 fathoms. 9 p. m. 4 specimens.D. 5495. August 2, 1909. Off Diuata Point, between Leyte and
^ Mindanao. Lat. 9? 06' 30" N. ; long. 125? 00' 20" E. 600 fathoms.
?1.54 p. m. . Bot. temp. 52.3?. 3 specimens.D. 5500. August 4, 1909. Off Macabalan Point, Mindanao.Lat. 8? 37^45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Surf. temp. 84?; bot. 53.5?. 8 specimens.
Ko. 2129. PHILIPPINE CRUSTACEANS?HANSEN. 653D. 5544. September 6, 1909. Off Coronado Point, northernMndanao. Lat. 8? 16' 30" N.; long. 122? 26' 30" E. 600 fathoms.11.17 a. m. Bot. temp. 49.8?. 5 specimens.D. 5616. November 22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 fathoms. 6.44 p. m.Sm'f. temp. 84?. 1 specimen.
27. STYLOCHEIRON MICROPHTHALMA H. J. Hansen.D. 5319. November 5, 1908. China Sea. Lat. 21? 31' N.;long. 117? 53' E. 20 fathoms. 7.23 p. m. Surf. temp. 79?.2 specimens.D. 5320. November 6, 1908. China Sea. Lat 20? 58' N.;long. 120? 03' E. 180 fathoms. 4 p. m. Bot. temp. 36.2?; dens.1.02574. 3 specimens.August 3, 1909. Mahinog, Camiguin Island, between Leyte andMindanao. (About lat. 9? 07' N.) 12-20 feet. 6.30 a. m.1 specimen.D. 5616. November22, 1909. Off Tifore Island, Molucca Passage.Lat. 0? 36' N.; long. 126? 52' 20" E. 20-30 feet. 6.44 p. m.
f Surf. temp. 84?. 4 specimens.
28. STYLOCHEIRON ABBREVIATUM G. O. Bars.D. 5320. November 6, 1908. China Sea. Lat. 20? 58' N.;long. 120? 03' E. 1804 fathoms. 2.25 p. m. Bot. temp. 36.2?;
I dens. 1.02574. 7 specimens.f D. 5288. July 22, 1908. Off Matacot Point, Luzon. Lat. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. 1 specimen.D. 5457. June 8, 1909. Off Legaspi Island, east coast of Luzon.Lat. 13? 12' N.; long. 123? 49' 40" E. 146 fathoms. 9.40 a. m.j 2 specimens.D. 5422. March 30, 1909. Off Lusaran Point. Lat. 10? 31' N.;long. 122? 18' 45" E. Surface. 7.17 p. m. Surf. temp. 82?.7 specimens.D. 5233. May 7, 1908. Off Limasaua Island. Lat. 10? 00' 22"N,; long. 124? 45' 06" E. 100 fathoms. 9 p. m. 9 specimens. .D. 5500. August 4, 1909. Off Macabalan Point. Mindanao.Lat. 8? 37' 45" N. ; long. 124? 36' 45" E. 200 fathoms. 11.25 a. m.Surf. temp. 84?; bot., 53.5?. 6 specimens.
29. STYLOCHEmON MAXIMUM H. J. Hansen.D. 5288. July 22, 1908. Off Matacot Point, Luzon. Lai. 13?43' 30" N.; long. 121? E. 115 fathoms. 8.14 a. m. 2 specimens.D. 5500. August 4, 1908. Off Macabalan Point., Mindanao.Lat. 8? 37' 45" N.; long. 124? 36' 45" E. 200 fathoms. 11.25a. m. Surf. temp. 84?; bot. 53.5?. Many specimens.
654 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 49.EXPLANATION OF PLATE 83.Euphausia fallax.Fig. la. Male copulatory organ of first left pleopod, unrolled and seen from behind;X42.16. Inner and median lobes of the organ shown in fig. In, from behind; X 64.p2, terminal process; p^, proximal process; p*, lateral process.Ic. Inner and median lobes of the same organ, from the inner side; X64. Thelettering as in fig. lb.Id. Distal part of the terminal (p^) and the proximal process (p^) of the same organ,from the inner side; X 100.Nematoscelis lobata.Fig. 2a. Anterior part of carapace, eyes, and the proximal half of the antennularpeduncles of an adult female, from above; X 13.26. Anterior part of carapace, eyes, and the proximal half of the antennularpeduncles of an adult male, from above; X 13.2c. Male copulatoiy organ of first left pleopod, unrolled and seen from behind;X64. Zm, median lobe.2d. Inner lobe and proximal inner part of the median lobe of the organ shown infig. 2c, from behind; X 105. p', spine-shaped process; p^, terminal process;p'\ proximal process; p'*, lateral process.2c. Inner lobe of another organ; X 105.2/ Inner and median {Im) lobe of a third organ, from in front; X 106.
I
U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 49 PL. 83
EUPHAUSIACEAN CRUSTACEANS FROM THE PHILIPPINE ISLANDS.For explanation of plate see page 654.