UPPER CRETACEOUS FORAMINIFERA FROM TRINIDAD By Joseph A. Cushman and P. W. JarvisCushman Laboratory for Foraminiferal Research, Sharon, Mass. INTRODUCTION Cretaceous foraminifera have already been described from Trini-dad/ but further collecting and continued study of Trinidad mate-rial have increased considerably the fauna already described in thisprevious paper. Though the arenaceous forms are often badly dis-torted, on account of pressure and conditions of fossilization, thecalcareous forms are usually well preserved and show much oftheir original detail. The entire collection represents a rather deep-water fauna that is not common in the Upper Cretaceous depositsof the general Gulf Coastal Plain of the United States, although theVelasco shale of the Tampico region represents most nearly the con-ditions under which these Cretaceous deposits of Trinidad were laiddown. The Trinidad material, however, is very much better pre-served than that of most of the Velasco shale, and it is thereforemuch better for detailed studies.Many of the genera and also many of the species of the arenaceousgroup that are still living in the deeper waters off the coast of Trini-dad are to be found in this Cretaceous material, often in considerablenumbers. Such genera as Gloinospira, ATumodiscus, Ammodiscoides,Affimolaffena, HorTnosina, jSaccorhisa, and others are common in theTrinidad collections. All these genera are known living off Trini-dad and usually in the same species, so that they seem to indicatethat conditions of deposition for this material in the Upper Creta-ceous are not very different from those that obtain off these coasts atthe present day.As already known from studies of the general Upper Cretaceousof the Gulf Coastal Plain of the United States, most of the speciesfound are already described by various European workers from 1 Cushman and Jarvis, Cretaceous foraminifera from Trinidad. Contr. Cushman Lab.Foram. Res., vol. 4, pp. 85-103, pis. 12-14, December, 1928.No. 2914.?Proceedings U. S. National Museum, Vol. 80, Art. 14.70827?32 1 1 2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 Cretaceous deposits of similar age from Europe and elsewhere.Since d'Orbigny's work in 1840, such authors as von Hagenow,Geinitz, Reuss, Alth, Schwager, Egger, Beissel, Franke, and othershave described many species from the European Upper Cretaceous.This literature has been carefully studied, together with abundantmaterial from the Upper Cretaceous of Ireland, England, France,Holland, and Germany, and the striking resemblance of Americandeposits to those of Europe has been constantly emphasized. As aresult very few new forms have had to be described from thisTrinidad material. Occasional striking forms seem to be new, butthey are the exception.The Upper Cretaceous, especially of the Gulf Coastal Plain ofthe United States, is of great economic importance to the petroleumindustry in geologic correlation. The entire region of the Gulf ofMexico and the Caribbean Sea was during Upper Cretaceous timesan area of general deposition of the Upper Cretaceous. Though thisTrinidad material is from deeper water than most of the GulfCoastal Plain deposits, nevertheless it contains many species in com-mon with those deposits, and this paper should therefore be usefulin connection with studies now being pursued of the various Creta-ceous regions of the Western Hemisphere.The plates are from drawings of Trinidad specimens by MissMargaret S. Moore.In order that available literature of recent years on the Cretaceousof America may be available to students, a list of these publicationsis given here. Many references to these will be found in the syn-onymy under the various species.Even a slight examination of the European and other literaturewill show that later authors have diverged widely from the originaldescription and figures given by the earlier authors who describedmany of the Cretaceous species. As a result it has been felt wise inmany cases to give only the first reference to a species. The follow-ing papers will be of use to anyone working with American Creta-ceous material : A. BIBLIOGRAPHY OF PAPERS ON THE FOKAMINIFERA (EXCLUSIVEOF ORBITOIDIDAE) FROM THE AMERICAN UPPER CRETACEOUS Bagg, R. M.1898. The Cretaceous foranunifera of New Jersey. U. S. Geol. Surv. Bull.88, pp. 1-89, pis. 1-6.Carman, Kathekine.1929. Some foraminifera from the Niobrara and Benton formations ofWyomiuff. .Tourn. Pal., vol. 3, pp. 309-315, pi. 34.Carsey, D. O.1926. Foraminifera of the Cretaceous of central Texas. Univ. Texas Bull.2612, pp. 1-56, pis. 1-8. ABT. 14 FORAMINIFERA FROM TRINIDAD?CUSHMAN AND JARVIS 6 Chubch, C. C.1929. The occurrence of Eyphopyxa in California. Journ. Pal., vol. Srp. 411.CUSHMAN, J. A.1926. The foraminifera of the Velasco shale of the Tampico Embaymenc. - Bull. Amer. Assoc. Petr. Geol., vol. 10, pp. 581-612, pis. 15-21.1926, Some foramiuifera from the Mendez shale of eastern Mexico. Contr, -Cushman Lab. Foram. Res., vol. 2, pp. 16-26, pis. 2, 3.1927. Some characteristic Mexican fossil foraminifera. Journ. Pal., vol!-I, pp. 147-172, pis. 23-28.1927. Some foraminifera from the Cretaceous of Canada. Trans. Roy. Soc.Canada, sect. 4, pp. 127-132, pi. 1.1927. American Upper Cretaceous species of Bollvina and related species,Contr. Cushman Lab. Foram. Res., vol. 2, pt. 4, pp. 85-91, plB.II, 12.1927. New and interesting foraminifera from Mexico and Texas. Contr.Cushman Lab. Foram. Res., vol. 3, pp. 111-117, pis. 22, 23.1927. Foraminifera of the genus Siphonina and related genera. Proc-U. S. Nat. Mus., vol. 72, art. 20, pp. 1-15, pis. 1-4. (One Uppes.-Cretaceous species included.)1928. The American Cretaceous foraminifera figured by Ehrenberg. Jourr?..Pal., vol. 1, no. 3, pp. 213-217, pis. 34-36, Jan.1928. A Cretaceous Cyclammina from California. Contr. Cushman Lab.Foram. Res., vol. 4, p. 70, pi. 9, figs. 5a, &.1928. A peculiar ClaviiUna from the Upper Cretaceous of Texas. ContnCushman Lab. Foram. Res., vol. 4, pp. 61, 62, pi. 8, figs. 1, 2.1928. Fistulose species of Gaudrytna and HeterostomcUa. Contr. CushmanLab. Foram. Res., vol. 4, pp. 107-112, pi. 16. (Includes Cretaceousspecies. ) 1929. Kyphopyxa, a new genus from the Cretaceous of Texas. Contr.Cushman Lab, Foram. Res., vol. 5, pp. 1-4, pi. 1, figs. 1-7.1929. Some species of SipTiogencrinoides from the Cretaceous of Venezuela.Contr. Cushman Lab. Foram. Res., vol. 5, pp. 55-59, pi. 9, figs. 5,6, 11-15.1930. Notes on Upper Cretaceous species of VaginuUna, FlabelUna, an&Frondicularia from Texas and Arkansas. Contr. Cushman Labv.Foram. Res., vol. 6, pp. 25-38, pis. 4, 5.CuBHMAN, J. A., and Chuech, C. C.1929. Some Upper Cretaceous foraminifera from near Coaliuga, Califor-nia. Proc. California Acad. Sci., ser. 4, vol. 18, no. 16, pp. 491--530, pis. 36-41.Cushman, J. A., and Haeeis, Reginald W.1927. Some notes on the genus CeraiobuUmina. Contr. Cushman Lai^,Foram. Res., vol. 3, pp. 171-179, pis. 29, 30. (One species from the-Navarro of Texas included.)Cushman, J. A., and Hedberg, Hollis D.1930. Notes on some foraminifera from Venezuela and Colombia. Gontr^Cushman Lab. Foram. Res., vol. 6, pp. 64-69, pi. 9, figs. 1-13.Cushman, J. A., and Jaevis, P. W.1928. Cretaceous foraminifera from Trinidad. Contr. Cushman LafciForam. Res., vol. 4, pp. 85-103, pis. 12-14. 4 PEOCEEDINGS OP THE NATIONAL. MUSEUM vol.80CusHMAN, J. A., and Ozawa, Yoshiaki.1930. A monograph of the foraminiferal family Polymorphinidne, Recentand Fossil. Proc. U. S. Nat. Mus., vol. 77, art. 6, pp. 1-185, figs. 1,2 (in text), pis. 1-40. (Contains numerous Cretaceous species.)CusHMAN, J. A., and Waters, J. A.1927. Some arenaceous foraminifera from the Upper Cretaceous of Texas.Contr. Cushman Lab. Foram. Res., vol. 2, pt. 4, pp. 81-85, pi. 10.1929. Some Arenaceous foraminifera from the Taylor Marl of Texas.Contr. Cushman Lab. Foram. Res., vol. 5, pp. 63-66, pi. 10, figs. 3-7.Cushman, J. A., and Wickenden, R. T. D.1928. A new foraminiferal genus from the Upper Cretaceous. Contr. Cush-man Lab. Foram. Res., vol. 4, pp. 12, 13, pi. 1, figs. 1, 2.1930. The development of Haiitkenina in the Cretaceous with a descriptionof a new species. Contr. Cushman Lab. Foram. Res., vol. 6, pp.39-43, pi. 6, figs. 1-6.JARVIS, p. W.1929. Some notes on Cretaceous occurrences at Lizard Springs, Trinidad.Journ. Inst. Petr. Tech., vol. 15,, pp. 44CM42. .MCBEMAN, W. L.1927. Fossil zones of the Eagle Ford of north Texas. Journ. Pal., vol. 1.pp. 89-101, pis. 13-16 [pp. 98-100, pi. 16].MOKRISON, T. E.1929. First authentic Cretaceous formation found on Gulf coast Snlt Domesof Texas. Bull. Amer. Assoc. Petr. Geol., vol. 13, pp. 1065-1069.Reuss, a. E.1861. PalJiontologische Beitrjlge. 4, Die Foraminiferen des senonischenGriinsandes von New Jersey. Sitz. Akad. Wiss. Wien, vol. 44,pp. 334-340.Tyrrell, J. B.1890. Foraminifera and Radiolaria from the Cretaceous of Manitoba.Trans. Roy. Soc. Canada, vol. 8, sect. 4, pp. 111-115.Weller, S.1907. A report on the Cretaceous paleontology of New Jersey. Geologicalsurvey of New Jersey?Paleontology. Vol. 4, pp. 189-265, pis. 1-4.White, Maynard P.1928-29. Some index foraminifera of the Tampico Embayment area ofMexico. Journ. Pal., vol. 2, pp. 177-215, pis. 27-29; pp. 280-317,pis. 3&-42 ; vol. 3, pp. 30-58, pis. 4, 5.Family ASTRORHIZIDAEGenus RHABDAMMINA M. Sars, 1869RHABDAMMINA DISCRETA H. B. BradyPlate 1, Figures 1, 2In our material we have abundant broken specimens similar tothose here figured. They have been referred to Brady's species,which they very closely resemble. The surface is roughened, butnone of them shows any central chamber. It is worthy of note herethat Franke in his work on the Cretaceous of Germany described aspecies as Astrorhisa cretacea Franke. It may be possible that our ART. 14 FORAMINIFEEA FROM TRINIDAD CUSHMAN AND JABVIS 5fragmentary specimens represent the arms of some such form, butuntil complete specimens are obtained it may be left under Rhab-dmnmhia. Family SACCAMMINIDAESubfamily SaccammininaeGenus SACCAMMINA M. Sars, 1869SACCAMMINA RHUMBLERI (Franke) (?)Plate 1, Piguke 3There are smooth specimens of a globular shape such as are figuredhere, the position of which is more or less questionable. In theirgeneral characters they resemble specimens that Franke has referredto as " Orbulmaria rhumbleH.'''' These specimens of ours seem tobelong to the genus Saccamviima^ but otherwise they are very closeto the German ones. Subfamily PelosininaeGenus PELOSINA H. B. Brady, 1879PELOSINA COMPLANATA FrankePlate 1, Figures 4-6 Pelosina complanafa Franke, Jahrb. kon. Preuss. Geol. Landes., vol. 32, pt. 2.p. 107, pi. 3, figs, la, b, 1911; Abb. Preuss. Geol. Landes., vol. Ill, p. 10,pi. 1, fig. 6, 1928.Saocatnmina scruposum White (not Hai)Jophragmium scruposum Berthelin),Journ. Pal., vol. 2, p. 183, pi. 27, fig. 5, 1928.Test free, single, invariably crushed to a lenticular shape; wallreplaced by amorphous silica, rough; aperture single, round, withshort neck.There are abundant specimens, especially in the Hobson clay fromthe Cretaceous of Trinidad, similar to those figured. They varyconsiderably in the coarseness of the material of the test, but thischaracter is a common one in the general arenaceous group. Speci-mens have a definite protuberant neck with a circular aperture. Thespecimens are always collaj)sed, and the center is usually occupiedby a depressed area. They seem to be identical with the specimensdescribed and figured by Franke under the above name. They areapparently identical with the specimens referred to by White underthe above reference. There is a possibility that these represent themegalospheric form of the species referred to further on in thispaper as Hormosina glolmllfera. In Recent material of that speciesmegalospheric forms are often found with a single large chamberand usually in considerable abundance. These specimens, therefore,are placed here with considerable doubt as to their true position. 6 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.80Family HYPERAMMINIDAESubfamily HyperammintnaeGenus HYPERAMMINA H. B. Brady, 1878HYPERAMMINA ELONGATA H. B. BradyPlate 1, Figubes 7, 8Hyperammina elongata H. B. Bbady, Ann, Mag. Nat. Hist., ser. 5, vol. 1, p. 433,pi. 20, figs. 2a, b, 1878. ? Cushman and Jakvts, Contr. Cushman Lab.Foram. Res., vol. 4, p. 86, pi. 12, fig. 1, 1928.There are in the Cretaceous material from Trinidad a number ofspecimens evidently belonging to Hyperanimina that have beenalready recorded in the above reference as Hypermnmina elongataH. B. Brady. There is considerable variation in the relative quan-tity of cement used in the test, and consequently some of these aresmoothly finished and others in which the quantity of arenaceoussnaterial is large are roughened. Similar conditions are found inHecent material. Franke notes the occurrence of a Hyperaminina in sthe German Cretaceous, but does not give a definite name to hissmaterial. HYPERAMMINA (?) sp. (?)Plate 1, Fiqttee 9There are a number of specimens in our material similar to thathere figured, which, as one end is closed and the other open, seemto belong to this genus. All these, however, have a distinctly col-lapsed appearance and are more or less distorted, and so there maybe some question as to the true generic position. They are givenhere for future reference for other workers on the group.Subfamily DendrophryinaeGenus SACCORHIZA Eimer and Fickert, 1899SACCORHIZA RAMOSA (H. B. Brady)Plate 1, Figures 10-12Hyperammina ramosa H. B. Brady, Quart. Jouvn. Micr. Sci., vol. 19, p. 33, pi. 3,figs. 14, 15, 1879; Denkschr. Akad. Wiss. Wien, vol. 42, p. 98, 1881; Rep.Voy. Challenger, Zoology, vol. 9, p. 261, pi. 23, figs. 15-19, 18S4.?H. B.Brady, Parker, and Jones, Trans. Zool. Soc. London, vol. 12, no. 7, p. 217,pi. 41, figs. 1-4, 13, 1888.?Egger, Abh. kon. bay. Akad. Wiss. Munclien,vol. 18, p. 255, pi. 4, fig. 15, 1893.?Goios, Kongl. Svensk. Vet. Akad. Handl.,vol. 25, no. 9, p. 18, pi. 4, figs. 61, 62, 1894 ; Bull. Mus. Comp. Zool., vol. 29,p. 22, 1896.?Chapman, Proc. Zool. Soc. London, 1895, p. 13; Biologicalresults fishing experiments Endeavour 1909-14, vol. 3, pt. 1, p. 13, 1915.?FuNT, Rep. U. S. Nat. Mus. for 1897, p. 270, pi. 11, fig. 1, 1899.?Rhumbler, ABT. 14 FOEAMI]SriFEEA FROM TRINIDAD CUSHMAIST AND JARVIS 7 Arch. Prot., vol. 3, p. 260, figs. 101 a, b (iu text), 1903.?Heron-Allen andEakland, Trans. Linn. Soc. London, vol. 11, pt. 13, p. 220, 1916.Saccorhiza ramosa Eimeje and Fickebt, Zeitsclar. Wiss. Zool., vol. 65, p. 670,1899.?CusHMAN, U. S. Nat. Mus. Bull. 71, pt. 1, p. 65, fig. 81 (iu text),1910 ; U. S. Nat. Mus. Bull. 104, pt. 1, p. 81, pi. 30, figs. 3, 4, 1918.?Peabcey,Trans. Roy. Soc. Edinburgh, vol. 49, p. 1004, 1914.There are numerous fragmentary specimens in the Cretaceous fromTrinidad that may be referred to the above species with little ques-tion. The tubes are somewhat collapsed, but they have the character-istic irregular curvature and especially the roughened surface oftencarrying broken spicules. No branching specimens were found.Franke ^ has recorded very similar, branching fragments from theGerman Cretaceous as '"'' Rhizmmnina algaejormis.'''' White ^ recordsa tubular fragment from the Velasco shale of Mexico as '"'' Rhizam-nrnia indivisa.'''' Family REOPHACIDAESubfamily ReophacinaeGenus REOPHAX Montfort, 1808REOPHAX sp, (?)Plate 1, Figtjbe 13Reophax sp. (?) Cushman and Jaevis, Contr. Cushman Lab. Forain. Res., vol. 4,p. 86, pi. 12, fig. 2, 1928.No further specimens were found of the form figured here, whichis the same one figured in the above reference.Genus HORMOSINA H. B. Brady, 1879HORMOSINA GLOBULIFERA H. B. BradyPlate 1, Figure 14Eormosma globuUfera H. B. Bbady, Quart. Jouru. Micr. Sci., vol. 19, p. 60,pi. 4, figs. 4, 5, 1879 ; Rep. Voy. Challenger, Zoology, vol. 9, p. 326, pi. 34,figs. 1-6, 1884. ? Cushman and Jarvis, Contr. Cushman Lab. Foram. Res.,vol. 4, p. 86, pi. 12, fig. 3. 1928.Specimens of this species are usually collap.sed to some extent,especially the later chambers, like those in the specimen here figured.The Cretaceous specimens seem to be exactly identical with the Re-cent ones that occur in Atlantic waters. As already noted underPelosina complanata^ there is a distinct possibility that those speci-mens may represent the megalospheric stage of Eormosma glohuli-fera. This is one of the species that give the close relationship of 'Abh. Preuss. Geol. Landes., vol. Ill, p. 12, pi. 1, fig. 1.3, 1928. 'Journ. Pal., vol. 2, p. 184, pi. 7, flg. 2, 1928. 8 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 this Cretaceous material to the Recent deep-water fauna of theAtlantic. Genus NODELLUM Rhumbler, 1913NODELLUM VELASCOENSIS (Cushman)Plate 1, Figuees 15-17 Nodosinella velascoensis Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p.583, pi. 20, fig. 9, 1926.?White, Journ. Pal., vol. 2, p. 309, pi. 41, fig. 15,1928.This species has already been recorded from the Velasco shale ofMexico, where it occurs in some abundance. It is very abundant,however, in the Hobson clay of Trinidad. Though it is usually dis-torted, as in Mexico, specimens are so abundant that a certain pro-portion of them may be found that shows the normal form of thespecies. The proloculum is always longer than broad and somewhatpear-shaped. The following chambers in the megalospheric formincrease very little if at all in diameter, while in the microsphericform they are much more numerous and increase rapidly in size asadded. The wall seems to be almost entirely chitinous and nearlytransparent, a fact that accounts for specimens being usually verymuch distorted. The other specimens of this genus are characteristicof comparatively deep water of the present oceans.Family AMMODISCIDAESubfamily AmmodiscinaeGenus AMMODISCUS Reuss, 1861AMMODISCUS GLABRATUS Cushman and JarvisPlate 2, Figure 1Ammodiscus glabratus Cushman and JAK\^s, Contr. Cushman Lab. Foram.Res., vol. 4, p. 86, pi. 12, figs. 6 a, b, 1928.Test planispiral, much compressed, concave on both sides, peripherybroadly curved; tubular chamber very gradually and uniformly in-creasing in size with succeeding coils; wall thin, composed almostentirely of cement, of a brownish color, very smooth and polished;aperture semicircular, at the end of the tubular chamber.This species was originally described from the Lizard Springsmaterial, and also occurs in the later collections from the Hobsonclay of San Fernando. The material of the test is almost entirelypure cement, although with a considerable magnification fragmen-tary material of small size can be seen. ART. 14 PORAMIISriFEEA FROM TRINIDAD?CUSHMAN AND JAEVIS 9AMMODISCUS PENNYI Cushman and JarvisPlate 2, Figxires 2. 3 Animodisous pennyi Cushman and Jabvis, Coutr. Cushman Lab. Foram. Res., vol. 4, p. 87, pi. 12, figs. 4, 5, 1928.Test planispiral, comparatively large, periphery broadly rounded,of a few coils, the tubular chamber increasing gradually in diameter ; suture deep and distinct; wall thick, conspicuously arenaceous butfairly smoothly finished; aperture semicircular at the end of thetube.This is one of the largest species of the genus and is representedby both megalospheric and microspheric specimens. In contrast withthe preceding species, the wall is very thick and has much arena-ceous material. It occurs in the pit at Lizard Springs, as well as ata depth of Y20 feet.Genus AMMODISCOIDES Cushman, 1909AMMODISCOIDES TURBINATUS CushmanPlate 2, Figures 4, 5 Ammodiscoides turWnatus Cushman, Proc. U. S. Nat. Mus., vol. 36, p. 424, pi.33, figs. 1-6, 1909; U. S. Nat. Mus. Bull. 104, pt. 1, p. 98, pi. 36, figs. 3-6,pi. 37, 1918.?Rhumbler, Foraminifera of the Plankton-Expedition, pt. 2,p. 388, figs. 124 a. d (in text), 1913.The Cretaceous material referred to this species has been very care-fully compared with the types in Kecent dredgings, and there are nocharacters by which they may be separated. Except for the differ-ences due to fossilization, it would be impossible to tell the fossiland Kecent specimens apart if they were mixed. This seems to bean excellent example of the persistence of a species over a longperiod where unchanged ecologic conditions have prevailed.The early whorls form a low cone on one side, and on the oppositeside a distinct depression, after which the succeeding coils are prac-tically in a single plane. The genus is already known from thePaleozoic and Recent collections, and this Cretaceous one is inter-esting as partially filling the gap between these. This species wasoriginally described from dredgings in the Gulf of Mexico, so thatit has persisted under similar conditions since the Cretaceous at least.Genus GLOMOSPIRA Rzehak, 1888GLOMOSPIRA GORDIALIS (Jones and Parker)Plate 2, Figures 6, 7Trochammina squamata var. gordialis Jones and Parkek, Quart. Journ. Geol.Soc, vol. 16, p. 304, 1860. ? Parker and Jones, Philos. Trans., vol. 155, p.408, pi. 15, fig. 82, 1865. 10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 Olomospira gordialis Cushman, U. S. Nat. Mus. Bull. 104, pt. 1, p. 99, pi. 36,figs. 7-9, 1918.?White, Journ. Pal., vol. 2, p. 187, pi. 27, fig. 8, 1928.?Cushman and Jabvis, Contr, Cushman Lab. Foram. Res., vol. 4, p. 87,pi. 12, figs. 7, 8, 1928.As is usual in Kecent material this species shows a very consider-able variation in the shape of the test, which is typically compressedin distinction from the following one, which is more or less globularin shape. Specimens appear to be identical with Recent materialfrom this same general region in comparatively deep water.GLOMOSPIRA CHAROroES (Jones and Parker) var. CORONA Cushman and JarvisPlate 2, Figitrbs 8-10Olomospira charoides (Jones and Parker) var. corona Cushman and Jarvis,Contr. Cushman Lab. Foram. Res., vol. 4, p. 89, pi. 12, figs. 9-11, 1928.Glomospira charoides (Jones and Parker), Whitei, Journ. Pal., vol. 2, p. 187,pi. 27, fig. 8, 1928.Variety differing from the typical in having the irregularly coiledlater portion in a sort of irregular crown at the end of the test in-stead of coiling about the whole test as in the typical form.This variety also occurs in the Cretaceous, Velasco shale of Mex-ico from which we have specimens. It is the form figured by White *from the Velasco. Recent specimens that we have seen, as well asthose figured, have the later portion coiling in the long axis of thetest after the spiral is completed.Genus LITUOTUBA Rhumbler, 1895LITUOTUBA LITUIFORMIS (H. B. Brady)Plate 2, Figures 11 a, hTrochammina lituiformis H. B. Beadt, Quart. Journ. Micr. Sci., vol. 19, p. 59,pi. 5, fig. 16, 1879.lAtuotuba lituiformis Rhumbler, Nachr. Kongl. Ges. Wiss. Gottingen, p. 84,1895 ; Arch. Prot, vol. 3, p. 279, figs. 128, a, h, 1903.?Cushman, U. S. Nat.Mus. Bull. 71, pt. 1, p. 114, fig. 175 (in text), 1910.?Cushman and Jarvis,Contr. Cushman Lab. Foram. Res., vol. 4, p. 90, pi. 12, figs. 15 a, 6, 1928.The figured specimen is evidently megalospheric and may be adistinct species, but the microspheric form should be studied. Theuncoiled portion is partially collapsed.No further specimens of this species have been found in a furthersearch of the Trinidad Cretaceous. It has been left under Brady'sspecies for the present at least. Franke, however, has described asomewhat similar species as " Lituotuha incertus " from the UpperCretaceous of Germany. Further specimens may show that Cre-taceous specimens of Germany and America are identical and distinctfrom the Recent one. * Journ. Pal., vol. 2, pi. 27, fig. 7, 1928. AHT. 14 FORAMINIPERA FROM TRINIDAD CUSHMAN" AND JARVIS 11Subfamily TolypammininaeGenus AMMOLAGENA Eimer and Fickert, 1899AMMOLAGENA CLAVATA (Jones and Parker)Plate 2, Figube 12Trochammina irregularis var. clavata Jones and Pakkeb, Quart, Journ. Geol.Soc, vol. 16. p. 304, 1860.Wehbina clavata H. B. Bkady, Proc. Roy. Soc. Edinburgh, vol. 11, p. 711, 1882;Rep. Voy. Challenger, Zoology, vol. 9. p. 349, pi. 41, figs. 12-16, 1884.Ammolagena clavata Eijier and Fickeet, Zeitschr. Wiss. Zool., vol. 65, p. 673^1899.?CusHMAN, U. S. Nat. Mus. Bull. 71, pt. 1, p. 68, figs. 86-89 (in text),1910.?CusHMAN and Jabvis, Contr. Cushman Lab. Foram. Res., vol. 4,p. 90, pi. 12, fig. 14, 1928.A single specimen of the megalospheric form is shown in the ac-companying figure. There are other specimens that evidently aremicrospheric, in which the proloculum is much smaller and the tubemuch longer, as in Recent specimens. There seems to be no differencebetween these Cretaceous forms and Recent forms from the same-general area. Specimens were found attached to Ammodiscus pennyi,Glomospira gordialis^ and Hyperammina elongata. These show thatthe same general relationship of these genera was already definitelypresent in the Upper Cretaceous. In the present oceans Ammolagenaclavata is often found attached to these genera and others of thearenaceous group, as well as to some of the flattened calcareous forms.This is another of the species that has kept its identity and its char-acters at least since Cretaceous times without any distinct changethat is apparent. Family LITUOLIDAESubfamily HaplophragmiinaeGenus KAPLOPHRAGMOIDES Cushman, 1910HAPLOPHRAGMOIDES CORONATA (H. B. Brady)Plate 2, Figures 13-15Trochammina coronata H. B. Brady, Quart. Journ. Micr. Sei., vol. 19, p. 58,pi. 5, fig. 15, 1879; Rep. Voy. Challenger, Zoology, vol. 9, p. 340, pi. 40, figs,10-12, 1884.Haplophragmoides coronata Cushman, U. S. Nat. Mus. Bull. 71, pt. 1, p. 90,figs. 145-147 (in text), 1910. ? Cushman and Jakvis, Contr. Cushman Lab,Foram. Res., vol. 4, p. 90, pi. 12, fig. 17, 1928.Trochamminoides irregularis White, Journ. Pal., vol. 2, p. 307, pi. 42, fig. 1, 1928,Trochatnminoides proteus White (not Karrer), vol. 2, p. 308, pi. 42, fig. 2, 192&The Cretaceous specimens, while most of them are distorted andcollapsed, have the general characters of the Recent species thatoccurs often abundantly in the present ocean in this same generalregion. Often the color of the Recent and Cretaceous forms is verysimilar. It is somewhat difficult to distinguish this species from i12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80TrocJiammina glohigeriniforinis, noted later, on account of the dis-tortion that takes place in fossilization, resulting in some very queer-shaped specimens. The specimens described by White in the abovereferences are probably distorted forms of this species. His Trocham-minokles irregularis is probably the megalospheric form, and T.proteus the microspheric form. These may, however, be much dis-torted forms of T. glohigeriniformis, and without seeing the originalspecimens it is difficult for one to determine this, even if it mightthen be possible. The distortion produced is often so great as verylargely to obliterate the original form.HAPLOPHRAGMOroES EXCAVATA Cushman and WatersPlate 3, Figure 1 Haplophragmoides excavata Cushman and Watees, Contr. Cushman Lab.Foram. Res., vol. 2, pt. 4, p. 82, pi. 10, figs. 3 a, &, 1927. ? Cushman, Trans.Roy. Soc. Canada, sec. 4, p. 128, pi. 1, fig. 1, 1927.Haplophragmoides sp. (?) Cushman and Jaevis, Contr. Cushman Lab. Foram.Res., vol, 4, p. 91, pi. 12, fig. 16, 1928.This species was originally described from the Upper Cretaceous,Navarro formation of Hunt County, Tex., where it is a commonspecies. It has also been recorded from the Upper Cretaceous ofwestern Canada in the above reference. Its distribution is very wide,and it is one of those sjDecies that persist in leached material wheremany of the calcareous forms have disappeared.HAPLOPHRAGMOIDES EGGERI CnshmanPlate 3, Figures 2 a, 6Haplophragmium fontinense Egger (not Terquem), Ber. nat. Regensburg, vol.12, 1907-1909, p. 10, pi. 3, figs. 16-18, 1910.Haplophragmoides eggeri Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p.583, pi. 15, figs. 1 a, ft, 1926.Haplophragmoides cf. siihglobosum (G. O. Saks), Cushman and Jaevis, Contr.Cushman Lab. Foram. Res., vol. 4, p. 91, pi. 12, figs. 13 a, h, 1928.This species, described previously from the Velasco shale of Mexico,occurs in Europe, Mexico, and Trinidad, and probably elsewhere. Itis somewhat variable and on account of distortion assumes variousshapes. Genus CRIBROSTOMOIDES Cushman, 1910CRIBROSTOMOIDES TRINITATENSIS Cushman and JarviaPlate 3, Figure 3 'CrUyrostomoddes trindtatensis Cushman and Jarvis, Contr. Cushman Lab. Foram.Res., vol. 4, p. 91, pi, 12, figs. 12 a, b, 1928.This genus has apparently not been recorded elsewhere in the Cre-taceous. It is a somewhat broader, more globular form than the ART. 14 FORAMINIFEEA FROM TRINIDAD?CUSHMAN AND JAEVIS 13 Kecent species and is fairly abundant in the material from LizardSprings, but it was not found in the other collections. Genus AMMOBACULITES Cushman, 1910AMMOBACULITES COPROLITHIFORME (Schwager)Plate 3, Figures 4, 5Eaplophrmjmium coprolithiformc Schwager, in Benecke's Geogn.-pal. Beitrage,vol. 1, p. 654, pi. 34, fig. 3, 1868.AmmobacuHtes coprolithiforme Cushman, Trans. Roy. See. Canada, sec. 4, p.130, pi. 1, figs. 6, 7, 1927.Test elongate, early portion close coiled, later chambers rectilinear,of uniform width, generally circular in section; sutures distinct,depressed ; wall arenaceous but smoothly finished ; aperture circular^terminal.This species originall}^ described from the Cretaceous of Europehas already been recorded from the Upper Cretaceous of westernCanada. Identical specimens occur in the Cretaceous of Trinidad^and the striking similarity of these may be seen by comparison ofthe hgures of the specimens of the two regions. It is quite probablethat some of the European specimens referred to Ammohaculitesagglutinans may belong to Schwager's species. The figures seem tobe similar. Subfamily LituolinaeGenus CYCLAMMINA H. B. Brady, 1876CYCLAMMINA ELEGANS, new speciesPlate 3, Figures 6 o, 6 Descript/ion.?Test comparatively large, close coiled, i^eripherysomewhat lobulated and subacute, or at least compressed; chambersnumerous, usually 10 to 12 in the last-formed coil; sutures distinct,slightly depressed, usually sigmoid; wall smooth, distinctly arena-ceous, thin, with a very even cancellated structure of the interiorshowing through; aperture consisting of a low curved arch at thebase of the apertural face with numerous supplementary roundedopenings scattered over the central portion of the apertural face,often with slightly raised borders. Length, 2 ; breadth, 1.25 ; thick-ness, 0.85 mm.Holotype.?U.S.'^M. No. 73815 (Cushman Coll. No. 15280), fromUpper Cretaceous, from pit at Lizard Springs near Guayaguayare,fcoutheastern Trinidad, British West Indies.RemMrhs.?This is fairly common in the Lizard Springs Creta-ceous, and is especially marked by the thin outer wall and the distinct 14 PEOCEEDINGS OP THE NATIONAL. MUSEUM vol.80 markings of the cancellated interior, which show distinctly from theoutside. Family TEXTULARIIDAESubfamily SpiroplectammininaeGenus SPIROPLECTAMMINA Cushman, 1927SPIROPLECTAMMINA DENTATA (Alth)Plate 3, Figures 7 a, 6 Tewtularia dentata Axth, Haidiiiger's Naturw. Abh., vol. 3, p. 262, pi. 13, fig.13, 1850.The figured specimen shows fairly well the characters of thisspecies described by Alth from the Upper Cretaceous of Europe.The chambers are low and broad, with the outer margins oftenending in a distinct point. In some respects this species is closelyallied to S. anceps (Reuss).SPIROPLECTAMMINA ANCEPS (Reuss) var.Plate 3, Figxibes 8 a, hIn the Trinidad Cretaceous, specimens occur that are clearly andclosely allied to Reuss's species. Two forms occur, one in whichthe sutures are distinct but not depressed or raised, and the other,figured herein, in which the sutures themselves are slightly thick-ened. They somewhat resemble such forms as Textularia tnexicanaCushman, known from the Tertiary of this general region and nowliving in the Gulf of Mexico, and also the form described by W.Berry as Teictularia ripleyensis. This Trinidad form differs fromeither of these, but material was not sufficient to warrant its beingdescribed as a distinct variety. In some respects it resembles theform described as " Bolimna velascoensis " from the Upper Creta-ceous, Velasco shale of Mexico.^SPIROPLECTAMMINA EXCOLATA (Cushman)Plate 3, Figures 9, 10 Textularia excoMta Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p. 585,pi. 15, figs. 9 a, &, 1926.?White, Journ. Pal., vol. 3, p. 30, pi. 4, figs. 1 a, &,1929.Test as broad as long, the sides flattened or somewhat convex;periphery, of early portion at least, acute; chambers few, the sidessomewhat concave ; sutures distinct on account of the thickening ofthe peripheral edge, the surface below being somewhat concave ; wallsmoothly finished. '?' Bull. Amer. Assoc. Petr. Geol., vol. 10, p. 586, pi. 16, figs. 1 a, h, 1926. AST. 14 FOEAMINIFERA FROM TRINIDAD CUSHMAN AND JARVIS 15 This species, originally described from the Velasco shale of Mexicoand later recorded by White from the same formation, occurs in theUpper Cretaceous of Trinidad, where it is fairly common in the mate- rial from Lizard Springs. A rather typical specimen is figured(pi. 3, fig. 9), as well as an extreme form (pi. 3, fig. 10), in which theexcavations of the chambers are carried to an unusual degree. Thisparticular specimen also shows the spiral early chambers to goodadvantage. Subfamily TextulariinaeGenus TEXTULARIA Defrance, 1824TEXTULARIA CONCINNA RenssPlate 4, Figttres 1, 2 Textularia concinna Reuss, Verstein. Bohm. Kreide, pt. 2, p. 109, pi. 24, fig. 54,1845-46.?CusHMAN and Jarvis, Contr. Cushman Lab, Foram. Res., vol. 4,p. 91, pi. 13, fig. 1, 1928,Two forms occur in the Cretaceous of Trinidad that are here re-ferred to Reuss's species. They occur together at the same locality,but one of these is much larger than the other. The angles of thechambers, however, are similar, and one may represent the micro-spheric and the other the megalospheric form of the same species.The smaller specimens are very typical of this species described byReuss from Europe.Family VERNEUILINIDAEGenus VERNEUILINA d'Orbigny, 1840VERNEUILINA POLYSTROPHA (Reuss)Plate 4, Figures 3 o, 6BuUmina polystropha Reuss, Verstein. Bohm. Kreide, pt. 2, p. 109, pi. 24, fig. 53,1845-46.?Alth, Haidinger's Naturw. Abh., vol. 3, pt. 2, p. 265, pi. 13, fig.19, 1850.Verneuilina polt/stropha H. B. Bkady, Ann. Mag. Nat. Hist., ser. 5, vol. 1, p. 436,pi. 20, figs. 9 a-o (?), 1878.Test elongate, slightly tapering, triserial, rounded in end view;chambers inflated, distinct, slightly longer than broad; sutures dis-tinct, depressed ; wall arenaceous, rather smoothly finished ; aperturerounded at the inner margin of the last-formed chamber. Length,0.45; breadth, 0.15 mm.This species was described by Reuss from the Cretaceous of Ger-many. It occurs in the Cretaceous of America, but the Recent mate-rial usually referred to it is probably not the same. IQ PROCEEDINGS OF THE NATIONAL MUSEUM vol.80Genus TRITAXIA Reuss, 1860TRITAXIA PYRAMIDATA ReussPlate 4, Figures 4 a, b Tritaxia pyramidata Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, pp. 32, 88, pi.1, fig. 9, 1862 (1863) ; Palaeontographica, vol. 20, pt. 2, p. 123, 1872-75(1874). ? Berthelin, Mem. Soc. G^ol. France, ser. 3, vol. 1, p. 25, pi. 1,figs. 4 a-G, 1880.?Chapman, Jouru. Roy. Micr. Soc, p. 2, pi. 11, figs. 2 a, b,1892. ? Fkanke, Abh. geol. pal. Inst. Univ. Greifswald, vol. 6, p. 18, pi.2, figs. 1 a-c, 1925; Abh. Preuss. Geol. Landes., new ser., vol. Ill, p. 138,pi. 12. figs. 18 a-c, 1928.This is a common species in the European Cretaceous and occursboth in the Trinidad collections and also in those of the generalCoastal Plain region of the United States. It differs from Tritaxiati'icaHnata in the much greater increase in diameter toward the aper-tural end, that of typical T. tricarlnata being of generally uniformwidth throughout. The test is triserial throughout, and the aperturebecomes rounded and terminal, usually protuberant, and with aslight lip. Genus GAUDRYINA d'Orbigny, 1839GAUDRYINA FILIFORMIS Berthclin Pi ATE 4, Figure 5Gaudryina fiUformis Bebthelin, M6m. Soc. Geol. France, s6r. 3, vol. 1, p. 25,pi. 1 (24), figs. Sa-d, 1880. ? Cushman and Jarvis, Contr. CuShman Lab.Foram. Res., vol. 4, p. 92, pi. 13, fig. 2, 1928.In the Lizard Springs material, typical slender specimens of thisspecies occur. The small, very elongate, slender test and the con-siderable length of the early triserial stage will distinguish it. Itis widely distributed in the Cretaceous of various parts of the world.GAUDRYINA RUGOSA d'OrbignyPlate 4, Figures 6 o. bGaudryina rugosa d'Orrigny, M4m. Soc. G?ol. France, s6r. 1, vol. 4, p. 44, pi. 4,figs. 20, 21, 1840.?Reuss, Verstein. Bohm. Kreide, pt. 1, p. 38, pi. 12, figs.15, 24, 1845-46 ; in Geinitz, Gruudr. A^ersteiu., p. 667, pi. 24, fig. 69, 1845-46 ; Sitz. Akad. Wiss. Wien, vol. 18, p. 244, pi. 5, fig. 61, 1856.?Fr^vnke, Abh.geol. pal. Inst. Univ. Greifswald, vol. 6, p. 14, pi. 1, fig. 19, 1925; Abh.Preuss. Geol. Landes., new ser., vol. Ill, p. 141, pi. 13, fig. 2, 1928.Textularia agglutinans W. Berry (not d'Orbigny), in Berry and Kelley, Proc.U. S. Nat. Mus., vol. 76, art. 19, p. 3, pi. 2, fig. 1, 1929.Test elongate, tapering, greatest breadth toward the aperturalend, periphery broadly rounded, early triserial portion usually muchreduced, but the change to the biserial stage very abrupt; chambersnumerous, usually distinct in the biserial portion, indistinct in thetriserial portion, very .slightly inflated in the later development: AET. 14 FOEAMINIFEEA FROM TRINIDAD?CUSHMAN AND JARVIS 17 sutures becoming more distinct in the later portion, straight, yerjslightly oblique; wall rather coarsely arenaceous but usually fairlysmoothly finished; aperture in the ordinary specimens, narrow, atthe inner margin of the chamber with distinct lobular projections atthe sides, in very long specimens the aperture tending to be some-what higher. Length, 0.5-1 mm.This is a very common species in the Cretaceous in Europe andAmerica and probably in Australia. There is considerable variationin the microspheric and megalospheric forms, the former reaching amuch greater size. GAUDRYINA RETUSA CushmanPlate 4, Figukes 7-10Gaudryina retusa Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p. 588, pi.16, figs. 10 a, b, 1926. ? Cushman and Jaevis, Coutr. Cusbmau Lab. Foram.Res., vol. 4, p. 92, pi. 13, figs. 3, 4, 1928.?White, Journ. Pal., vol. 2, p. 313,pi. 42, figs. 8, 9, 1928.Vernetiilina sp. (?) Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p. 587,pi. 16, figs. 12rt, 6, 1926.Vemeuilina rotunda White, Journ. Pal., vol. 2, p. 310, pi. 42, figs. 5 a, h, 1928.Test fairly large, stout, nearly circular in transverse section, com-posed of few chambers, early ones triserial, later ones biserial ; cham-bers distinct, somewhat inflated ; sutures distinct, in the later portionslightly depressed; wall arenaceous but rather smoothly finished;aperture comparatively small, low.White described a small form as Vemeuilina rotunda. He alsorecords Gaudinjina retusa from the Upper Cretaceous of Mexico, andthe range of his V. rotunda is included in his table in the range ofG. retusa. It is very probable that the Vemeuilina is only the youngstage, perhaps of the microsplieric form of G. retusa. The earlytriserial stages of Gaudryhia and Clavulina have often been describedas species of Veimeuilina in the literature.GAUDRYINA INDENTATA Cushman and JarvisPlate 4, Figube 11Oaudryina indentata Cushman and Jaevis, Contr. Cushman Lab. Foram. Res.,vol. 4, p. 92, pi. 13, fig. 7, 1928.Test somewhat elongate, tapering from the subacute initial end,the sides of the adult nearly parallel, circular in transverse section ; chambers numerous, early ones triserial, adult biserial, the middleportion of each chamber indented and the sutures raised in roundedridges ; wall arenaceous but smoothly finished ; aperture small, semi-circular, at the base of the inner margin of the last-formed chamber.Length, 0.6; diameter, 0.4 mm.70827?32 2 1? PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 This species is peculiar in having depressed chambers. The sameform occurs in the Upper Cretaceous of the Velasco shale of Mexico.GAUDRYINA OXYCONA ReussPlate 5, Figures 1, 2 Oaudryina oxycona Reuss, Sitz. Akad. Wiss. Wien, vol. 40, p. 229, pi. 12, figs.3 a-c, 1860; vol. 46, p. 33, 1862 (1863).?Franke, Abh. geol. pal. Inst. Univ.Greifswald, vol. 6, p. 15, pi. 1, figs. 20 a, b, 1925.?Cushman and Church,Proc. California Acad. Sci., ser. 4, vol. 18, no. 16, p. 501, pi. 36, figs. 3, 4,1929.Test elongate, conical, tapering, nearly circular in transverse sec-tion; very early chambers triserial, later ones biserial; sutures dis-tinct, slightly depressed, nearly at right angles with the periphery ; wall finely arenaceous, very smoothly finished; aperture elongate,low, at the inner median margin of the chamber in a decided depres-sion. Length, 0.55-1.25; breadth, 0.3-0.75 mm.This is a widely distributed and well-characterized species. It isknown from the California Cretaceous and occurs also in the Velascoshale of Mexico and in the Cretaceous of the Gulf Coastal region ofthe United States.GAUDRYINA LAEVIGATA Franke var. PYRAMIDATA CushmanPlate 5, Figure 3Oaudryina laevigata Fbankb var. pyramidata Cushman, Bull. Amer. Assoc.Petr. Geol., vol. 10, p. 587, pi. 16, figs. 8a, b, 1926. ? Cushman and Jarvis,Contr. Cushman Lab. Foram. Res., vol. 4, p. 92, pi. 13, fig. 6, 1928.?White,Journ. Pal., vol. 2, p. 313, pi. 42, fig. 7, 1928.Test differing from the typical in the stouter form, the early por-tion more pyramidal than the type ; the periphery, instead of roundedand convex, slightly concave.This variety is a common one in the Cretaceous of America andis already described from the Velasco shale of Mexico and from thisTrinidad material. It occurs widely distributed in the Upper Cre-taceous of the Gulf Coastal Plain of the United States. Genus CLAVULINA d'Orbigny, 1826CLAVULINA TRILATERA CnshmanPlate 5, Figueb 5Clavulina trilatera Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p. 588,pi. 17, fig. 2, 1926 ; Journ. Pal., vol. 1, p. 149, pi. 28, fig. 1, 1927.?Cushmanand Jarvis, Contr. Cushman Lab. Foram. Res., vol. 4, p. 93, pi. 13, fig. 8,1928. ART. 14 FOKAMINIFERA PEOM TRINIDAD?CUSHMAN AND JARVIS 19 Test large, elongate, sides parallel for most of their length, slightly(.'ontracted at each end, entire test triangular in transverse section,the periphery rounded, the sides concave; chambers numerous, theearly ones triserial, later ones forming the larger part of the test,uniserial; sutures very slightly if at all depressed, somewhat indis-tinct; wall coarsely arenaceous but very smoothly finished; apertureterminal, circular, with a very slight neck.This sjDecies is apparently very abundant in the Gulf Coastal Cre-taceous of the United States. The original figures show only themegalospheric form, which has nearly parallel sides and compara-tively few chambers. The microspheric form is much larger andincreases rapidly in diameter toward the apertural end, but usuallyoccurs with the megalospheric form. The surface is usually smoothlyfinished, and quite different from the following species. It wasoriginally described from the Upper Cretaceous, Velasco shale ofMexico and is common in the Cretaceous of Texas, Arkansas, andTennessee but rare in this deeper-water material from Trinidad.CLAVULINA ASPERA CushmanPlate 5, Figueb 4Clavulina trilatera Cushman var. aspera Cushman, Bull. Amer. Assoc. Petr.Geol., vol. 10, p. 589, pi. 17, fig. 3, 1926. ? Cushman and Jarvis, Contr.Cushman Lab. Foram. Res., vol. 4, p. 93, pi. 13, fig. 5, 1928. ? White, Journ.Pal., vol. 2, p. 315, pi. 42, fig. 14, 1928.This species was originally described as a variety of Clavulina tri-latera. A further study of these forms from Mexico, Trinidad, andthe general Gulf Coastal region of the United States seems to showthat the two are distinct species. G. aspera always seems to have arough surface, and in the typical form the sides are nearly parallel,although they may be somewhat more flaring in the microsphericform. Such specimens are rare in Trinidad, but the following varietyis much more common.CLAVULINA ASPERA Cushman WHITEI, new varietyPlate 5, Figures 6-8Clavulina trilatera White (not Cushman), Journ. Pal., vol. 2, p. 315, pi. 42,fig. 13, 1928.Description.?Differs from the typical in the shape of the test,which in the megalospheric form has the triangular portion confinedto the early portion of the test after which a series of rounded cham-bers of nearly uniform size is developed, in the microspheric form,with the triangular form continued throughout or becoming quad-rangular in section, test increasing gradually in diameter to theapertural end; wall roughened. 20 PROCEEDINGS OF THE NATIONAL. MUSEUM vol. 80Holotype of vofnety.?lJ.^.'^M. No. 73816 (Cushman Coll. No.15306), from Upper Cretaceous of pit at Lizard Springs, nearGuayaguayare, southeastern Trinidad, British West Indies.Remarks.?This variety is very common in the Trinidad materialbut is not well developed in the Upper Cretaceous of the UnitedStates, although it does occur in Mexico.CLAVULINA CHITINOSA, new speciesPlate 5, Figubes 9-11 Desofiption.?Test elongate, slender, the early triserial portionoften being of slightly greater diameter than the later uniserial por-tion ; chambers numerous, fairly distinct ; sutures distinct, depressed,especially in the last-formed part of the uniserial portion; wallalmost entirely chitinous, clear, and translucent, very smooth; aper-ture terminal, with a slight neck and lij). Length, up to 1 ; diameter,up to 0.3 mm. ^oZ(?^2//;e.?U.S.N.M. No. 73817 (Cushman Coll. No. 15315), fromUpper Cretaceous of pit at Lizard Springs, near Guayaguayare,southeastern Trinidad, British West Indies.Remarks.?This is a peculiar form evidently representing deep-water conditions, where the wall of the test becomes almost entirelypure chitin. As a result of this type of wall, specimens are usuallymuch distorted, but the figures will give the general appearance ofthe species. Family SILICINIDAEGenus RZEHAKINA Cushman, 1927RZEHAKINA EPIGONA (Rzehak) var. LATA Cushman and JarvisPlate 6, Figures 1 a, h Rzehakina epigona (Rzehak) var. lata Cushman and .Tarvis, Coutr. CushmanLab. Foram. Res., vol. 4, p. 93, pi. 13, figs. 11 a, I, 1928.Test differing from the typical in the broader, nearly circular formand the much more prominent appearance of the last coil, foirmingalmost a rounded carina about the periphery. This is the commonestform in the collection. Some young specimens show the early coilsmaking a flattened test before the lateral thickenings are added.This variety is more rounded and much larger than the form foundin the Velasco shale of Mexico. In addition to the Lizard Springslocality, it is abundant in the Hobson clay from San Fernando.Trinidad. ART. 14 FORAMINIFERA FEOM TRINIDAD CUSHMAN AND JARVIS 21Family TROCHAMMINIDAESubfamily TrochammininaeGenus TROCHAMMINA Parker and Jones, 1860TROCHAMMINA GLOBIGERINIFORMIS (Parker and Jones)Plate 6, Figures 2-5 Lituola glotigeriniforniis Parkeb and Jones, Phil. Trans., vol. 155, p. 407, pi. 15,figs. 46, 47, pi. 17, fig.s. 9&-98 ?, 1865.Eaplophragmium glohigerinifornie Caepenter. The microscope, ed. 6, p. 561,figs. 320 a, & (in text), 1881.Trochammlna gloiigeriniformis Cushman, U. S. Nat. Mus. Bnll. 71, pt. 1, p. 124,figs. 193-195 (in text), 1910. ? Cushman and Jarvis, Contr. Cushman Lab.Foram. Res., vol. 4, p. 95, pi. 13, figs. 12 a, b, 1928.There are numerous excellent specimens of this species in the col-lection from Trinidad. Many specimens are crushed, but a numberof them are in their original form like the figured one. These crushedforms are common both at Lizard Springs and in the Hobson clayfrom San Fernando, Trinidad. The remarks already made underEaplophragmoides coronata may be applicable to this species as well.TROCHAMMINA TRINITATENSIS Cushman and JarvisPlate 6, Figures 6 a-cTrochammina trinitatensis Cushman and Jarvis, Contr. Cushman Lab. Foram.Res., vol. 4, p. 95, pi. 13, figs. 13 a-c, 1928.Test nearly circular in dorsal view, biconvex from the periphery,trochoid, somewhat keeled, slightly umbilicate on the ventral side;chambers numerous, 12 or more in the final whorl, not very distinctexcept for the slight collapse of the wall ; central portion of the dorsalside showing the spiral suture slightly depressed ; the sutures of theventral side nearly radial, slightly curved, depressed ; wall arenaceouswith numerous angular fragments and much cement; aperture elon-gate, ventral, at the base of the chamber. Diameter, 0.4; thickness,0.2 mm.This is a striking species, appearing at first glance something likean Anomalina but ha^dng an arenaceous test, which is easily collapsed.Family LAGENIDAESubfamily NodosariinaeGenus ROBULUS Montfort, 1808There are numerous species of the Lagenidae in the Cretaceous ofTrinidad, nearly all of which have already been described from theCretaceous of Europe. An examination of the literature shows how 22 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 later authors have deviated from the type of the species until thelater determinations show little relationship to the original. Forthis reason, in many cases, only the first reference is given in thesynonymy. ROBULUS WILLIAMSONI (Reuss)Plate 6, Fiqtjees 7 a, & Cristellaria vnlUamsoni Reuss, Sitz. Akad. Wiss. Wien, vol. 44, pt. 6, p. 327, pi.6, figs. 4 0, 6, 1861 (1862). ? Cushman and Church, Proc. California Acad.Sci., ser. 4, vol. 18, no. 16, p. 503, pi. 36, figs. 13, 14, 1929.The specimen figured here is very close to the typical form figuredand described by Reuss from the Cretaceous of Germany. It has adistinct keel, few chambers, depressed and slightly curved sutures,and a smooth surface. The apertural face is distinctly concave withraised edges. ROBULUS OLIGOSTEGIA (Reass)Plate 6, Figukes 8, 9 Cristellaria oligostegia Reuss, Sitz. Akad. Wiss. Wien, vol. 40, p. 213, pi. 8,fig. 8, 1860; vol. 46, pt. 1, p. 93, pi. 13, figs. 2 a, i, 1862 (1863).This is a very thick species with a few tumid chambers, the laterones showing a slight tendency to uncoil. The aperture is slightlyprotuberant. ROBULUS STERNALIS (Berthelin)Plate 6, Figukes 11 a, b Cristellaria sternalis Berthelin, Mem. Soc. G?ol. France, s6r. 3, vol. 1, p. 51,pi. 3 (26), figs. 2 a, b, 1880.This species may be distinguished from R. wilUamsoni by the dis-tinctly umbonate character of the test. The angle of the sutures isvery different in the two species, as are also the shape and form of thechambers. ROBULUS TRINITATENSIS. new speciesPlate 6, Figures 10 a, h Description.?Test close coiled, compressed, periphery slightlykeeled ; chambers fairly distinct, 6 to 8 in number in the adult, notinflated ; sutures fairly distinct, strongly curved, continuing into theumbilical region, strongly limbate, but not raised ; wall ornamentedby a series of obliquely curved costae, toward the periphery grad-ually becoming nearly parallel to the outer edge of the test, and con-tinuous over the chambers; aperture at the peripheral angle, with asupplementary elongate opening in the median line of the ventralface. Length, 0.5; breadth, 0.4; diameter, 0.2 mm. ABT. 14 FORAMINIFEEA PKOM TRINIDAD CUSHMAN" AND JARVIS 23Holotype.?U.S.'^M. No. 73818 (Cushman Coll. No. 15316), fromUpper Cretaceous of pit at Lizard Springs near Guayaguayare,southeastern Trinidad, British West Indies.Remarks.?This is a very interesting and unique species with itspeculiar ornamentation, the heavy costae of the surface forming acontinuous spiral independent of the individual chambers.ROBULUS SUBALATUS (Reuss)Plate 7, Figures 1, 2 CristeUaria subalata Reuss, Denksclir. Akad. Wiss. Wien, vol. 7, pt. 1, p. 68,pi. 25, fig. 13, 1854 ; Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 76, pi. 8, fig.10, pi. 9, fig. 1, 1862 (1863).The figured specimens may be referred to this species described byKeuss from the Cretaceous of Europe. Plate 7, Figure 2, shows themore typical form in which the sutures are somewhat raised abovethe general surface of the test. Otherwise the general form andshape of the chambers are similar, and both specimens are markedby a very broad thin keel. Length, 1.25; breadth, 0.9; thickness,0.5 mm. ROBULUS MACRODISCUS (Renss)Plate 7, Figures 3 a, b CristeUaria macrodlsca Reuss, Sitz. Akad. Wiss. Wieu, vol. 46, pt. 1, p. 78, pi.9, figs. 5 a, &, 1862 (1863).?Berthelin, M6m. Soc. Geol. France, s6r. 3,vol. 5, p. 48, pi. 3, figs. 6-11, 1880.Lenticulina macrodisca AVhite, Journ. Pal., vol. 2, p. 198, pi. 28, fig. 7, 1928.Close coiled specimens, with a very large prominent umbo and anacute periphery, which is occasionally slightly keeled, occur in theCretaceous of Trinidad and may be referred to Reuss's species. Theyare distinctly of the Rohulus type, with a very prominent supple-mentary apertural slit as shown in the figure herein. The measure-ments of the figured specimen are: Length, 1.2; breadth, 1.1; thick-ness, 0.55 mm. ROBULUS DISCREPANS (Renss)Plate 7, Figures 4 a, 6Roiulina discrepans Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 78, pi. 9,figs. 7 a, b, 1862 (1863).Forms similar to that figured here are referred to Reuss's speciesdescribed by him from the Upper Cretaceous of Europe. Similarones occur in the Trinidad material. A comparison of our figuredspecimen with the type given by Reuss will show the very greatsimilarity in the two. The chambers are not inflated, but graduallyincrease in size as added. The periphery is subacute, and the aper-tural face somewhat concave. The sutures are flush with the surface 24 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.80 and are strongly curved, continuing nearly to the periphery on theinner margin. There is a supplementary slit in the median line ofthe apertural face, placing this species in the genus Rohulus^ as wasindicated by Eeuss, who placed it in Robulina.Genus LENTICULINA Lamarck, 1804LENTICULINA NAVICULA (d'Orbiffny)Plate 7, Figures 5 a, & Cristellai'ia namcula d'Orbigny, Mem. Soc. Gr?ol. France, s6r. 1, vol. 4, p. 27,pi. 2, figs. 19, 20, 1840.?Reuss, Verstein. Bohm. Kreide, pt. 1, p. 35, pi. 12,fig. 27, 1845^6.D'Orbigny described this species from the Cretaceous chalks of theParis Basin, and Eeuss and others have recorded it from the Creta-ceous of central Europe. Our specimens from Trinidad seem toagree very well with those of Europe and may be identified withd'Orbigny's species. The chambers are distinct but not inflated,the periphery subacute, the sutures flush with the surface but stronglycurved, and the apertural face convex without any supplementary slit, so that this species may be included in Lamarck's genus. Thereis a tendency in the later chambers toward uncoiling. The measure-ments of the figured specimen are as follows : Length, 0.9 ; breadth,0.55 ; thickness, 0.4 mm.This species is also widely distributed in the Coastal Plain regionof the United States in the Upper Cretaceous.LENTICULINA NUDA (Reuss)Plate 7, Figures 6 a, bCristellaria nudu Reuss, Sitz. Akad. Wiss. Wien, vol. 44, pt. 1, p. 328, pi. 6,figs. 1-3, 1861 (1862).Lenticulma nuda Cushman and Jakvis, Contr. Cushman Lab. Foram. Res., vol.4, p. 96, pi. 14, fig. 2, 1928.This species, described by Reuss from the Cretaceous of Europeand recorded by various authors from the same region, is alreadynoted by us from Trinidad. There is no supplementary aperture sofar as our material shows. The species is somewhat similar to thepreceding, but the apertural face is more concave and the peripherymore distinctly keeled. There is a distinct tendency to uncoiling,and the chambers are lower. Our figured specimen has the followingmeasurements: Length, 0.8; breadth, 0.4; thickness, 0.28 mm.Genus PLANULARIA Defrance, 1824PLANULARIA ADVENA, new speciesPlate 8, Figubes 1, 2Description.?Test large, much compressed, periphery acute andslightly keeled ; chambers distinct, low and broad, uniformly increas- ABT. 14 FOEAMINIFERA FROM TRINIDAD?CUSHMAN AND JAKVIS 25 iiig in breadth as added but with the height remaining nearly thesame throughout, the later ones becoming much elongate; sutureslimbate, in the early portion raised and somewhat irregularly beaded,later becoming entirely so, and in the last-formed portion even slightlydepressed; wall, except for the umbilicus, which is beaded, and theraised sutures, smooth; aperture at the peripheral angle, radiate.Length, 5; breadth, 3; thickness, in the umbonal region, 0.9, at themiddle of the last-formed chamber, 0.35 mm.Holotype.?\5.^.'^M. No. 73824 (Cushman Coll. No. 15317), fromUpper Cretaceous of pit at Lizard Springs near Guayaguayare,southeastern Trinidad, British West Indies.Remarks.?This is a large and striking species with a distinctiveornamentation. The greatest breadth is formed early in the develop-ment of the test in the umbonal region, after which it becomescomplanate and much thinner. Genus MARGINULINA d'Orbigny, 1826MARGINULINA GRATA (Reuss)Plate 7, Figxjbes 7 a, b ; Plate 8, Figures 3 a, 6 Cristellaria grata Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 70, pi. 7, figs.14 a, b, 1862 (1863).?Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10,p. 598, pi. 19, figs. 1 a, b, 1926.Lenticulina grata Cushman and Jarvis, Contr. Cushman Lab. Foram. Res., vol. 4, p. 96, pi. 14, fig. 3, 1928.Test elongate, compressed, periphery rounded; chambers distinct,the early ones coiled, later ones uncoiling, of rather uniform shapeincreasing slightly in size and height as added; sutures distinct,limbate, flush with the surface, gently curved; wall smooth; apertureradiate, at the peripheral margin. Length, 1.1-1.2; breadth, 0.3-0.4;thickness, 0.2-0.25 mm.This is a common Upper Cretaceous species known from numerouslocalities in Europe and widely distributed in America.MARGINULINA MULTISEPTATA (Reuss)Plate 8, Figures 4 a, 6 Cristellaria multiseptata Reuss, Haidinger's Natnrw. Abh., vol. 4, pt. 1, p. 33,pi. 2, fig. 9, 1851; Deukscln-. Akad. Wiss. Wien, vol. 25, p. 147, pi. 3, figs.14, 15, 1865.Test longer than broad, periphery subacute, later portion uncoiling ; chambers fairly distinct, very slightly if at all inflated; suturesdistinct, flush with the surface, slightly curved; wall smooth; aper-ture radiate, at the peripheral margin. Length, 1.2-1.4; breadth,0.6-0.75 ; thickness, 0.35-0.4 mm. 26 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80The figured specimen is an unusual one, showing a great irregu-larity in the overlapping of the chambers, which produces an unusualarrangement of the sutures from the exterior.MARGINULINA SCHLOENBACHI (Renss)Plate 8, Figures 5 a, & Cristellaria schloenbacM Reiuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 65,pi. 6, figs. 14, 15, 1862 (1863).Test elongate, much compressed, curved, periphery rounded ; cham-bers distinct, elongate, those of the later portion uncoiling andbecoming higher and less broad ; sutures distinctly curved especiallytoward the periphery, limbate, flush with the surface; wall smooth;aperture terminal, radiate. Length, 1.25-1.4; breadth, 0.35-0.4;thickness, 0.2-0.25 mm.This species was originally described by Reuss from the Cretaceousof Europe, and seems to be a variable one. It has been recorded bynumerous authors both from the Tertiary and as living in Recentseas. MARGINULINA MODESTA RensaPlate 8, Figures 6 a, bMarginuUna modesta Reuss, Sitz. Akad. Wiss. Wien, vol. 40, p. 207, pi. 7,fig. 5, I860.?Franke, Verb. Nat. Hist. Ver., vol. 59, p. 275, 1912 (1913).?CuSHMAN and Church, Proc. California Acad. Sci., ser. 4, vol. 18, no. 16,p. 506, pi. 87, figs. 8-10, 1929.Test elongate, very little if at all compressed ; the early chambersslightly coiled, later ones uncoiled and somewhat inflated, nearlycircular in transverse section; sutures distinct, slightly depressed;wall smooth; aperture radiate, subterminal, somewhat toward theperipheral margin. Length, 1-1.2; thickness, 0.45-0.5 mm.This is a common species in the Cretaceous of various parts of theworld and has already been recorded from the Cretaceous of Cali-fornia, and it occurs in the Cretaceous of Trinidad and in the GulfCoastal Plain region of the United States.MARGINULINA BULLATA RenssPlate 8, Figures 7, 8MarginuUna Mllata Reuss, Verstein. Bohm. Kreide, pt. 1, p. 29, pi. 13, figs.34-38, 1845-46; in Geinitz, Grundr. Verstein.. p. 656, pi. 24, fig. 16, 1845-46.?Franke, Abh. geol. pal. Inst. Univ. Greifswald, vol. 6, p. 55, pi. 4, fig. 25,1925; Abh. Preuss. Geol. Landes., vol. Ill, p. 76, pi. 6, fig. 28, 1928.?CusHMAN and Jakvis, Contr. Cushman Lab. Foram. Res., vol. 4, p. 96,pi. 14, figs. 7, 8, 1928.?Cushman and Church, Proc. California Acad. Sci.,ser. 4, vol. 18, p. 507, pi. 38, figs. 4-6, 1929. ART. 14 FORAMIISriFEKA FROM TRINIDAD CUSHMAN AND JARVIS 27 Test composed of few chambers, the earlier ones close coiled, thelast two or three uncoiled and globular, all chambers strongly inflated;sutures distinct, slightly depressed; wall smooth throughout; aper-ture in the adult terminal, radiate. Length of adult specimens, 0.75mm. or more.This is a widely distributed species in the Upper Cretaceous ofEurope and America. The megalospheric form has fewer chambersand the early portion often consists largely of the globular prolocu-lum ; in the microspheric form the coiling is evident and the increaseof the earlier chambers less rapid.MARGINULINA HUMILIS (Renss)Plate 8, Figxtrb 9 Cristellaria humilis Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 65, pi. 6,figs. 16, 17, 1862 (1863).?CuSHMAN, Bull. Amer. Assoc. Petr. Geol., vol. 10,p. 601, pi. 19, fig. 8, 1926.Marginulina humilis Cushman and Church, Proc. Callforula Acad. Sci., ser. 4, vol. 18, p. 505, pi. 37, figs. 3-5, 1929.Test elongate, subcylindrical, slightly compressed; chambers dis-tinct, the later ones only slightly inflated, of nearly uniform shape,but increasing slightly in height as added, on account of the fact thatthe later chambers are less involute; sutures distinct, very slightlydepressed between the later chambers ; wall smooth ; aperture radiateand peripheral. Length, 1.2-1.5 ; diameter, 0.4-0.45 mm.This is a very common species in the Cretaceous, occurring in Eu-rope and America already known from the Velasco shale of Mexicoand from the Cretaceous of California. It occurs also in the GulfCoastal Plain Cretaceous of the United States.MARGINULINA JONESI ReussPlate 9, Figures 1 a, bMnrginuUna jonesi Reuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 61, pi. 5,figs. 19 a, b, 1862 ( 1863 ) .?Bekthelin, Mem. Soc. G^ol. France, ser. 3, vol. 1,p. 34, 1880.?Chapman, Quart. Journ. Geol. Soc, vol. 50, p. 709, 1894; Journ.Roy. Micr. Soc, p. 164, pi. 4, fig. 24, 1894.?Shehlock, Geol. Mag., vol. 1,p. 259, pi. 18, fig. 15, 1914.?Neavekson. Geol. Mag., 1921, p. 462.?Cushmanand Church, Proc. California Acad. Sci., ser. 4, vol. 18, p. 507, pi. 38,figs. 7-9, 1929.Test elongate, early portion compressed and chambers closecoiled, later becoming uncoiled; periphery acute and keeled in theearly portion ; later chambers nearly circular in section ; sutures moreor less obscured but the ornamentation of the surface, which consistsof elongate costae continuing throughout the length of the test, un-broken at the sutures, terminal face smooth; aperture in the adult 28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 terminal, radiate, with a slight neck. Length, 0.9-1; breadth,0.35-0.6; thickness, 0.25-0.5 mm.This species, which is common in the Cretaceous of Europe, hasonly been recorded in America from the Cretaceous of California.Our specimens from Trinidad are somewhat more inflated, especiallyin the later chambers, but the general characters of the species arefairly constant. MARGINULINA DECORATA (Reuss)Plate 9, Fiqtjkes 2 a, h Cristellaria deoorata Reuss, Zeitschr. deutsch. geol. Ges., vol. 7, p. 209, pi. 8^fig. 16 ; pi. 9, figs. 1, 2, 1855.Test elongate, compressed, the periphery lobulate; early chamberscoiled, later ones uncoiled and becoming narrower as they are added ; sutures distinct, limbate, raised, the earlier ones broken into a seriesof beadlike projections, later ones nearly entire ; aperture somewhatproduced, at the peripheral angle. Length, 1.5-1.65; breadth, 0.6-0.8; thickness, 0.5-0.6 mm.This is a somewhat variable species, but the figured specimensseem to be close enough to Reuss's original types to be included underhis species. MARGINULINA TRILOBATA d'OrbignyPlate 9, Figures 3, 4 Marginulina triloMta d'Orbigny, M^m. Soc. G6ol. France, s^r. 1, vol. 4, p. 16,pi. 1, figs. 16, 17, 1840.Test elongate, the sides nearly parallel, periphery rounded ; cham-bers distinct, rather uniform in size and shape; sutures distinct, lim-bate ; the central portion at each side raised and thickened ; wall, ex-cept for the sutural projections, smooth; aperture radiate, at theperipheral margin. Length, up to 3.5; breadth, 0.7-0.8; thickness,0.4-0.45 mm.The specimen figured is a megalospheric one and does not show theearly coiled chambers, which are much more apparent in micro-spheric specimens. The raised sutures are somewhat variable in thedegree of thickening, but this character is usually present in consider-able degree. The types of this species were described by d'Orbignyfrom the Cretaceous chalks of the Paris Basin, and it is rather widelydistributed in the chalky phase of the Upper Cretaceous of Europeand America. ABT. 14 FOBAMINIFERA FROM TRINIDAD CUSHMAN AND JARVIS 29Genus DENTALINA d'Orbigny, 1826DENTALINA MEGAPOLITANA ReussPlate 9, Figuee 5Dentalina meijapolitana Rsniss, Zeitschr. deutsch. geol. Ges., vol. 7, p. 267, pi. 8,fig. 10, 1855.Nodosaria megapolitana Feanke, Abh. geol. pal. Inst. Univ. Greifswald, vol.6, p. 33, pi. 3, fig. 8, 1925. ? Cushman, Bull. Amer. Assoc. Petr. Geol., vol.10, p. 595, pi. 18, fig. 16, 1926.Test large, fairly stout, tapering, slightly fusiform, greatestbreadth developed before the last-formed chamber in the adult;chambers numerous, not inflated, distinct, of uniform shape, gradu-ally increasing in size as added, the later ones often slightly decreas-ing; sutures distinct, not depressed, slightly oblique; wall smooth;aperture radiate, slightly protuberant at the inner angle of the ter-minal face of the last-formed chamber. Length, up to 2; breadth,up to 0.3 mm.The figured specimen, while not typical, nevertheless may beincluded in this species of Reuss. The specimen is an incomplete one,and the species is found in the Trinidad Cretaceous. It has alreadybeen recorded from the Upper Cretaceous of Mexico in the Velascoshale and is common in Cretaceous deposits of the general GulfCoastal Plain region of the United States.DENTALINA FILIFORMIS Reuss (?)Plate 9, Figukes 6, 7The figured specimens show the early stages as well as some of thelater chambers of a slender, slightly curved form which has beenreferred by Franke ^ to Reuss's species. This form is fairly com-mon in the American Cretaceous of the general Gulf Coastal Plain,as well as of Trinidad.DENTALINA CATENULA RenssPlate 9, Figukes 8 o, &Dentalina catenula Reuss, Sitz. Akad. Wiss. Wien, vol 40, p. 185, pi. 3, fig. 6,1860.Test compressed, of a few chambers, slightly arcuate, rounded intransverse section; chambers distinct, inflated, subglobular; suturesdepressed, distinct ; wall smooth ; aperture small, radiate, at the endof a distinct protuberance, at the peripheral margin of the chamber.Length, 0.6-0.75 ; diameter, 0.2 mm.The chambers in this species are very much inflated and subglobu-lar, and usually only a few of them make up the test. The apertureis especially protuberant. 'Abh. Preuss. Geol. Landes., vol. Ill, p. 9, pi. 2, figs. 19 a, I, 1928. 30 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.80DENTALINA LEGUMEN (Reuss)Plate 9, Fiqxjbe 9 Nodosaria legumen Reuss, Versteiu. Bohm. Kreide, pt. 1, p. 28, pi. 13, figs. 23,24, 1845^6; in Geinitz, Palaeontograpliica, vol. 20, pt, 2, p. 88, pi. 20, fig.22, 1874.?Fkankb, Abh. geol. pal. Inst. Univ. Greifswald, vol. 6, p. 32, pi. 3,fig. 6, 1925.Dentalina legumen Reuss, Haidinger's Naturw. Abh., vol. 4, pt, 1, p. 26, pi.1, fig, 14, 1851 ; Sitz. Akad. Wiss. Wien, vol. 40, p. 187, pi. 3, fig. 5, I860.?Franke, Abh. Preuss. Geol. Landes., new ser., vol. Ill, p. 27, pi, 2, fig, 23,1928.Test elongate, slender, tapering, slightly curved; chambers distinct,inflated, increasing rather rapidly in size as added, apertural endmuch extended with an elongate neck, initial chamber rounded orwith a single short spine; sutures distinct, depressed, oblique; wallsmooth; aperture radiate at the end of an elongate neck. Length,0.75-0.9 ; breadth, 0.1-0.2 mm.This common European Cretaceous species occurs in Trinidad andin the various portions of the Gulf Coastal Plain of the UnitedStates. DENTALINA CONFLUENS ReussPlate 9, Fiqubes 10-12 Dentalina confluens Rextss, Sitz. Akad. Wiss. Wien, vol. 44. pt. 1. p. 335, pi. 7,fig. 5, 1861 (1862).Test elongate, slightlj'^ tapering, the early portion often somewhatcompressed; later chambers becoming inflated and distinct; suturesdepressed, especially in the later portion; wall ornamented by numer-ous rather coarse longitudinal costae, those of the early portion par-ticularly, continuous over adjacent chambers and often somewhatoblique, later ones often broken at the sutures ; aperture at the end ofa distinct neck, radiate. Length, 2-2.8 ; diameter, 0.5-0.6 mm.Two distinct forms are shown in the figures. The more elongateform with the somewhat twisted costae at the base is much more likethe original figure of Reuss, but the other form occurs with this,and it seems that the two should be included together as variants ofone species. DENTALINA ANNULATA (Reuss)Plate 10, Figueb 1Nodosaria annulatn Reuss, Geogu. Skizze Bohmen, vol. 2, pt. 1, p. 210, 1844;Verstein. Bohm. Kreide, pt. 1, p. 27, pi. 8, figs. 4, 67 ; pi. 13, fig, 21, 1845-46 ; in Geinitz, Palaeontographica, vol, 20, pt. 2, p. 85, pi. 20, figs. 19, 20, 1874.Dentalina annulata Reuss, in Alth, Haidinger's Naturw. Abh., vol. 3, pt. 2,p. 269, pi. 13, fig. 29, 1850 ; vol. 4, pt. 1, p. 26, pi. 1, fig. 13, 1851.?Feanke,Abh. Prouss. Geol. Landes., vol. Ill, p. 34, pi. 2, figs. 34, 35, 1928.Dentalina cf. adolphina Cushman and Jaevis (not d'Orbigny), Contr. CushmanLab. Foram. Res., vol. 4, p. 97, pi, 14, fig. 6, 1928. ABT. 14 FOEAMIlSriFERA FEOM TRINIDAD CUSHMAN AND JAEVIS 31 Test much elongated, slender, tapering, greatest width toward theapertural end; chambers distinct, inflated, subglobular, increasingrather uniformly in size, the early ones somewhat less inflated;sutures distinct, depressed, more so between the later chambers ; wallsmooth; aperture radiate, terminal. Length, 0.8-1.25; diameter,0.15-0.25 mm.This species we have already recorded from Trinidad as Dentalinacf. adolphina. It seems to fit rather well the species described byReuss from the Cretaceous of Europe and should be placed underhis species. DENTALINA sp. (?)Plate 9, Figure 13Tlie peculiar broken specimen figured is given simply that therecord of it may be available for future workers on the Cretaceousof this area. It has very thick limbate sutures as one of its maincharacters. DENTALINA sp. (?)Plate 10, Figure 3The broken specimen figured has very coarse costae, which projectsomewhat at the base of each chamber and are in the later chambersprojected as short spines. No complete specimens were found.DENTALINA LORNELA.NA d'OrbignyPlate 10, Figure 2Dentalina lorneiana d'Orbigky, Mem. Soc. G6ol. France, s6r. 1, vol. 4, p. 14,pi. 1, figs. 8, 9, 1840.?Feanke, Abh. Preuss. Geol. Landes., vol. Ill, p. 28,pi. 2, fig. 29, 1928.Test elongate, slightly arcuate; chambers increasing gradually inlength as added until the final chamber is often twice as long aSbroad; sutures distinct, slightly depressed in the later portion; wallsmooth ; aperture terminal, radiate, very slightly projecting. Length,1.6; diameter, 0.2 mm.This species was originally described by d'Orbigny from the Cre-taceous chalk of the Paris Basin, and it has been very widely recordedfrom Europe and elsewhere. It is a common species in Trinidad andin the Upper Cretaceous of the Gulf Coastal Plain of the UnitedStates. Genus NODOSARIA Lamarck, 1816NODOSARIA CONCINNA RcussPlate 10, Figure 4Nodosaria ooncmna Reuss, Sitz. Akad. Wiss. Wien, vol. 40, p. 178, pi. 1, fig. 3,1860.?CusHMAN and Jarvis, Contr. Cushman Lab. Foram. Res., vol. 4, p. 97,pi. 14, figs. 5, 11, 1928. 32 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 Test elongate, composed of a few much inflated, subglobular cham-bers, becoming slightly longer than broad in the later chambers, thebase often with a slight spine; sutures strongly depressed; wallsmooth ; aperture terminal, radiate, very slightly projecting. Length,1 ; maximum breadth, 0.35 mm.This species has been widely recorded from the Cretaceous ofEurope, occurs in the Cretaceous of Trinidad, and is probably widelydistributed in America.NODOSARIA LIMBATA d'Orbigny Plate! 10, Figure 5 Nodosaria Umbata d'Orbigny, M6m. Soc. G6ol. France, ser. 1, vol. 4, p. 12, pi.1, fig. 1, 1840.Test composed of a few inflated chambers, slightly separated fromone another by distinct but very short connections; chambers some-what pyriform; sutures distinct, somewhat depressed; wall smooth;aperture terminal, radiate, drawn out to a subacute point.We have already referred to this form as Nodosaria concinnaReuss.'' A copy of this same specimen is given here, and it seems tofit d'Orbigny's species better than that of Reuss.NODOSARIA LIMBATA d'Orbigny var. TUMIDATA new varietyPlate 10, Figxtbes 6 a, h Description.?^Variety differing from the typical in the shape ofthe chambers, which are somewhat conical, the greatest breadth beingnearly at the base of the basal portion, very strongly truncated asshown in the figure.Eolotype of variety.?\J.^.'^M. No. 73819 (Cushman Coll. No.15321), from Upper Cretaceous of pit at Lizard Springs nearGuayaguayare, southeastern Trinidad, British West Indies.Remarks.?This is evidently closely related to d'Orbigny's species,as there are intermediate forms present. A similar intermediateform between this variety and the typical is figured from the Velascoshale.^ NODOSARIA LIMBATA d'Orbigny var. BASIOBNATA new varietyPlate 10, Figubes 7, 8 Description.?Variety differing from the typical in the ornamen-tation of the surface, which consists of numerous subnodose projec-tions on the swollen portion of each chamber. ' Contr. Cushman Lab. Foram. Res., vol. 4, pi. 14, fig. 11, 1928.? Cushman, Bull. Amer. Assoc. Petr. Geol., vol. 10, p. 597, pi. 18, fig. 6, 1926. AET. 14 FORAMINIFEEA FROM TRINIDAD?CUSHMAN AND JARVIS 33 Holotype of vaWei^y.?U.S.N.M. No. 73820 (Cushman Coll. No.15319), from Upper Cretaceous of pit at Lizard Springs nearGiiaj^aguayare, southeastern Trinidad, British West Indies.Remarks.?This variety is very distinctly marked and has thegreatest width of the chamber progressively becoming nearer thebase as chambers are added, but less distinctly so than in thepreceding variety. NODOSARIA MONILE t. HagenowPlate 10, Figuee 9Nodosana monile v. Hagenow, Neues Jabrb. fiir Min., 1842, p. 568.?Reuss,Verstein. Bobm. Kreide, pt. 1, p. 27, pi. 8, fig. 7, 1845^6.?Fbankb, Abh.Preuss. Geol. Landes.. v Figures 8, a, &. Spiroplectmtimina anceps (Reuss) var., X 40. a. Front view; b.apertural view.9,10. Spiroplectamminu excolata (Cushman). Figure 9, X 60; front viewof partially developed specimen. Figure 10, X 40; very highlydeveloped specimen, a, Front view ; 6, apertural view.Plate 4 Figures 1,2. Textularia concmna Reuss. Figure 1, X 40. Figures 2 a, J>,X 30. a. Front view; &, apertural view.3a, 6. Verneuilma polystropha (Reuss), X 60. a, Front view; &, aper-tural view.4 a, 6. Tritaxia pyramidata Reuss, X 25. a, Front view ; ft, aperturalview.5. Gaudryina filiformis Bertlielin, X 80.6 a, 6. Gaudryina rugosa d'Orbigny, X 30. a, Front view ; 6, aperturalview.7-10. Gmulru'ma retusa Cushman, X 40. Figure 8 a, Front view; &,apertural view. Figure 10, early Verneuiline stage.11. Gaudryina indentata Cushman and Jarvis, X 35. Holotype.Plate 5 Figures 1, 2. Gaudryina- oxycona Reuss. Figure 1, X 40. Figure 2, X 35. a, a. Front views ; ft, &, apertural views.3. Gaudryina laevigata Franke var. pyramidata Cushman, X 35.4. Clavulina uspera Cushman, X 30.5. Clavulina trilatera Cushman, X 30.G-8. Clavulina aspera Cushman, whitei, new variety, X 30. Figure 6,holotype ; a, side view ; &, apertural view. Figures 7, 8, micro-spheric specimens with angular later portions ; a, a, side views ; 6, &, apertural views.9-11. Clavulina chitinosa, new species, X 40. Figure 9, holotype. Allspecimens somewhat distorted by pressure.Plate 6 Figures 1 a, h. Rzehakina epigona (Rzehak) var. lata Cushman and Jarvis,X 30. a, Side view ; h, apertural view.2-5. Trochammina glohigerlniformis (Parker and Jones), X 30.Figure 2 a, dorsal view ; V, side view. Figure 3, side view.Figure 4, ventral view of a much distorted and compressedspecimen. Figure 5, dorsal view.6 Or-c. Trochaimnina trinitatensis Cushman and Jarvis, X 40.0, Dorsal view ; h, ventral view ; e, peripheral view.7 a, b. Robulus williamsoni (Reuss), X 40. a, Side view; 6, aperturalview,8, 9. Rohulus oligostegia (Ruess), X 40. Figure 9 a, side view;6, apertural view.10 a, 6. Roinlus trinitatensis, new species, X 55. a, Side viewb, apertural view. ?11 0, b. Robulus stemalis (Berthelin), X 40. a, Side view; b, aper-tural view. AUT. 14 FOEAMIXIFERA FROM TRINIDAD CUSHMAN AND JARVIS 57 Plate 7 FiGur.ES 1, 2. Eodiiliis sulalatus (Reiiss), X 35. Figure 2 a, side view; b,apertural view.3 a, &. Robulus macrodisGus (Reuss), X 40. a, Side view; h, aperturalview.4 a, h. Rohidus discrepans (Reuss), X 40. a, Side view; 6, aperturalview.5 a, b. Lenticulinu navicula (d'Orbigny), X 40. a, Side view; h, aper-tural view.6 a, b. LenticuUna nuda (Reuss), X 60. a, Side view ; b, apertural view.7 a, b. Atawginnllnu grata (Reuss), X 60. a, Side view; b, peripheralview. Plate 8 Figures 1, 2. PJanularia advena, new species, X 15. Figure 1, holotype; a,side view ; b, apertural view.3 a, b. MarginuJlna grata (Reuss), X 40. a, Side view; b, peripheralview.4 a, b. Marginulina tnultiseptata (Reuss), X 40. a, Side view; 6, pe-ripheral view.5 a. b. Margiiinlina achloenbacM (Reuss), X 40. c, Side view; 6, pe-ripheral view.6 a, b. Marginulina modesta Reuss, X 25. a, Side view; h, peripheralview.7, 8. MarginuJina bullata Reuss. Figure 7, X 40. Figure 8, X 60.Figure 7 a, side view; b, apertural view.9. MarginuJina humilis (Reuss), X 30.Plate 9 FiGUKEs 1 (/, b. Marginulina jonesi Reuss, X 40. a, Side view; b, peripheralview.2 a, b. Marginulina decorata (Reuss), X 25. a, Side view; b, periph-eral view.3. 4. MnrginuUna trilobata d'Orbigny. Figure 3, X 25. Figure 4,X 20. Figure 3 a, side view ; b, peripheral view. Figure 4 a,side view ; b, peripheral view.5. Dentalina megapolitana Reuss, X 20.6, 7. Dentalina filiformis Reuss (?), X 20. Figure 6, later chambers.Figure 7, earlier chambers including the proloculum.8 a, b. Dentalina catenula Reuss, X 60. a, Side view; b, aperturalview.9. Dentalina legumen (Reuss), X 40.10-12. Dentalina conflucns Reu.ss, X 20.13. Dentalina sp.(?), X 20. Plate 10 I-^iGURE 1. Dentalina annulata (Reuss), X 60.2. Dentalina lorneiana d'Orbigny, X 30.3. Dentalina sp.(?), X 25.4. Nodosaria coneinna Reuss, X 40. 58 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 80 Figure 5. Nodosaria Um'oata d'Orbigny, X 60.6 a, b. Nodosaria limbata cVOrbiguy tumidata, new variety, X 20. a, Sideview; b, apertural view.7, 8. Nodosaria limbata d'Orbigny basiomata, new variety, X 20. Figure8, holotype.9. Nodosaria monile v. Hagenow, X 20.10. Nodosaria orthopleura Reuss, X 20.11. Nodosaria brevitesta Franke, X 60.12. Nodosaria cf. marcki Reuss, X 60.13. Nodosaria afflnis Reuss, X 20.14, 15. Nodosaria paupercula Reuss, X 20. Plate 11 Figures 1-4. Nodosaria velascoensis Cusliman. Figures 1, 2, X 60. Figures 3,4, X 30. Figures 1, 2, portions possibly of the same specimen.5. Nodosaria aspera Reuss, x 30.6. Nodosaria sp. (?), X 20.7,8. Pseudoglandulina cylindracea (Reuss). Figure 7, X 30. Figure8, X 20.9. Pseudoglandulina paraUcla (Marsson), X 40.10-12. Pseudoglandulina bistegia (Olszewski) (?). Figures 10, 11, X 25.Figure 12, X 40. Figure 10 a, side view; b, apertural view.Figures 10 and 11 are of a peculiar form in which the prolocu-lum is peculiarly rugose.13. Pseudoglandulina sp. (?), X 40.14. Flabellina semireticulata Cushman and Jarvis, X 50.15. Flabellina reticulata Reuss, X 50. Plate 12 Figure 1. Flabellina interpunctata von der Marck, X 40.2. Flabellina elliptica (Nilsson), X 15.3. Frondicularia elongata White (?), X 40.4. Frondicularia cordai Reuss, X 30. Apertural half of a broken speci-men.5. Frondicularia gracilis Franke (?), X 20. Apertural half of a brokenspecimen,6. Lagena orbignyana (Seguenza), X 40.7 a, b. Lagena orbignyana (Seguenza) var., X 40. a, Side view; b, aper-tural view.8 a, b. Guttulina adhaerens (Olszewski), X 40. a, Side view, 6, aperturalview.9 a, b. Pseudopolymorphina ozawana, new species, X 20. a, Front view;6, apertural view.10, 11. Ramulina sp. (?), X 3012 o, b. Nonion cretaceum, new species, X 40. c. Side view ; 6, peripheralview.13 a, b. Operculina catenula, new species, X 25. o, Side view ; 6, peripheralview. ART. 14 FOEAMINIPERA FROM TRINIDAD?CUSHMAN AND JARVIS 59 Plate 13 FiGUKEsla, &. Giimhelina sp. (?), X 40. a. Front view; b, side view.2. DoUvinoides decorata (Jones) var. deUcatula Cusliman, X 75,3 a, b. Bolimnoides trinitatensis Cusliman and Jarvis, X 75. a, Frontview; b, apertural view.4 a, h. Bulimina trinitatensis Cushman and Jarvis, X 75. a, Front view ;b, apertural view.5,6. Spiroplectoides clotho (Grzybowski), X 75. Figure 5, micro-spheric form. Figure 6, megalospheric form.7. Loxostomum plaitiim (Carsey), X 55.8a, 6v Pleurostomella clavuta Cusliman, X 40. a. Front view; &, aper-tural view.9, 10. ElUpsopleurostomclla cnrta Cushman, X 40. Figure 10 a, sideview ; b, apertural view.11-13. EUipsoHOdosaria subnodosa (Guppy). Figure 11, X 20. Figures12, 13, X 40. Figures 11, 13, microspheric forms. Figure 12,megalospheric form.14r-16. ElHpsoylanduUna exponens (H. B. Brady), X 50. a, a, Sideviews; b, b, apertural views.17 a-c. Valvulineria allomorphinoides (Reuss), X 40. a, Dorsal view; &,ventral view; c, peripheral view. Plate 14 FiGUBEsl a-c. Gyroidina depressa (Alth), X 55. a. Dorsal view; &, ventralview ; c, peripheral view.2 a-c. Gyroidina nitida (Reuss) , X 40. a, Dorsal view ; &, ventral view ; c, peripheral view.3,4. Gyroidina globosa (v. Hagenow). Figure 3, X 55. Figure 4,X 40, a, a, Dorsal views ; b, b, ventral views ; c, c, periplieralviews. ^5 a-c. Eponides haidingerii (d'Orbigny), X 40. a, Doi-sal view; &, ven-tral view; o, peripheral view.6 0-0. Pulv'inulinella velascocnsis (Cushman), X 40, a, Dorsal view;b, ventral view ; c, peripheral view. Plate 15 Figures 1, 2. PulvinuUnella alata (Marsson), X 40. Figure 1 a, dorsal view;b, ventral view ; c, peripheral view.3 c-c. Allomorphina trochoid cs (Reuss), X 75. o, Dorsal view; b, ven-tral view ; o, peripheral view.4 a, &. PuUenia quinqueloba (Reuss), X 40. o. Side view; b, aperturalview,5 a, b. PuUenia coryelU White, X 40. a. Side view; b, apertural view.6 a, &, Globigerinella sp. (?), X 55. o. Side view; b, apertural view.7 Or-c. Globotruncana area (Cushman), X 40. c. Dorsal view; b, ventralview ; c, peripheral view.8 Or-e. Globorotalia velascocnsis (Cushman), X 70. a, Dorsal view;b, ventral view; c, peripheral view. QQ PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 80 : art. 14Plate 16 Figures 1 Or-c. AnoniaUna ammonoides (Reuss), X 40. a, Dorsal view; b, ven-tral view ; c, peripheral view.2 a-c. Anomalina polyrraphes (Reuss), X 40. a, Dorsal view; b, ven-tral view ; c, peripheral view.3-5. Anomalina ruhiginosa Oushman, X 40. Figures 3, 4, youngstages showiug variation. Figure 5, adult, a, a, a. Dor-salviews; 6, b, &, ventral views; c, c, c, peripheral views.6 a-c. Planulina constricta (v. Hagenow), X 40. a, Dorsal view; J), ventral view ; c, peripheral view.7 a-c. PlaimUna schloenhachi (Reuss), X 40. a, Dorsal view; b, ven-tral view ; c, peripheral view.8 a-c. Planulina sp. (?), X 40. a, Dorsal view; b, ventral view; c, peripheral view. U. S. GOVERNMENT PRINTINS OFFICE: I9J2 U. S NATIONAL MUSEUM PROCEEDINGS. VOL 80, ART 14 PL 1 Cretaceous Foraminifera from TrinidadFor FXPLANATION OF PLATE SEE PAGE 55, U. S. NATIONAL MUSEUM PROCEEDINGS. VOL. 80, ART. 14 PL. 2 CRETACEOUS FORAMINIFERA FROM TRINIDADFor explanation of plate see page 55 U. S. NATIONAL MUSEUM PROCEEDINGS, VOL 80. ART. 14 PL. 3 Cretaceous Foraminifera from TrinidadFor explanation of plate see pages 55. 56 U. S. NATIONAL. MUSEUM PROCEEDINGS. VOL 80. ART 14 PL 4 Cretaceous Foraminifera from TrinidadFCR EXPLANATION OF PLATE SEE PAGE 56. U. S. NATIONAL MUSEUM PROCEEDINGS. VOL 80. ART 14 PL. 5 Cretaceous Foraminifera from TrinidadFOR EXPLANATION OF PLATE SEE PAGE 56. U. S. NATIONAL MUSEUM PROCEEDINGS. VOL. 80, ART 14 PL. 6 Cretaceous Foraminifera from TrinidadFOR FVPLANATION OF PLATE SEE PAGE 5f5. U. S. NATIONAL MUSEUM PROCEEDINGS VOL. 80. ART 14 PL. 7 Cretaceous Foraminifera from TrinidadFor explanation of plate see page 57 U. S. NATIONAL MUSEUM PROCEEDINGS. VOL. 80. ART. 14 PL. 8 Cretaceous Foraminifera from TrinidadFOR EXPLANATION OF PLATE SEE PAGE 57 U. S. NATIONAL MUSEUM PROCEEDINGS. VOL.. 80. ART. 14 PL. 9 Cretaceous Foraminifera from TrinidadFOR EXPLAN/>TION OF PLATE SEE PAGE 57 U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 80. ART. 14 PL. 10 Cretaceous Foraminifera from TrinidadFor explanation of plate see pages 57. 58. U. S. NATIONAL MUSEUM PROCEEDINGS. VOL. 80, ART. 14 PL. 11 Cretaceous Foraminifera from TrinidadFOR EXPLANATION OF PLATE SEE PAGE 58 U. S. NATIONAL- MUSEUM PROCEEDINGS, VOL. 80. ART 14 PL. 12 Cretaceous Foraminifera from TrinidadFor explanation of plate see page 58 U. S. NATIONAL MUSEUM PROCEEDINGS. VOL 80. ART 14 PL. 13 Cretaceous Foraminifera from TrinidadFOR EXPLANATION OF PLATE SEE PAGE 59, U. S. NATIONAL MUSEUM PROCEEDINGS. VOL. 80. ART. 14 Pl_. 14 Cretaceous Foraminifera from TrinidadFor explanation of plate see page 59. U. S. NATIONAL MUSEUM PROCEEDINGS, VOL. 80. ART. 14 PL. 15 Cretaceous Foraminifera from TrinidadFor explanation of plate see page 59. U. S. NATIONAL MUSEUM PROCEEDINGS. VOL 80. ART. 14 PL 16 Cretaceous Foraminifera from TrinidadFor explanation of plate see page 60.