UNITED STATES NATIONAL MUSE'DM BULLETIN 216 



in most of the Paleocene, Eocene, and lower Oligocene 

 Olohigerina marls of Trinidad. They can be easily 

 recognized in a fauna consisting of floods of Glohigerina 

 and Oloborotalia and are therefore useful for a first 

 quick estimation of the age of a sample. Chiloguem- 

 belina is also found in samples containing mainly a 

 benthonic fauna. This type of fauna is well known 

 from the Gulf Coast of the United States. Chiloguem- 

 belina is then often the most accin-ate means of correlat- 

 ing these faunas with planktonic assemblages from 

 other localities. 



Previous Records of Chiloguembelina from the 

 Tertiary of Trinidad 



Cushman and Jarvis (in Cushman, 1933) describe 

 Guembelina goodwini from the Hospital HiU marl of 

 Trinidad (upper Eocene, Globigerapsis semiinvoluta 

 zone). Cushman and Kenz (1948, p. 23) report 

 Guembelina goodwini from all units of the Navet forma- 

 tion except the Ramdat marl. Gumbelina goodmni is 



now regarded as a junior synonym of Textidaria 

 martini Pijpers (1933). 



Guembelina trinitatensis was described from the 

 Paleocene of Soldado Rock (off the southwest coast of 

 Trinidad) by Cushman and Renz (1942). 



Guembelina ultimatumida White is reported by Cush- 

 man and Renz (1946, p. 36, pi. 6, figs. 1, 2) from the 

 Lizard Springs formation. This identification has to 

 be revised, as it was probably influenced by the belief 

 that the Lizard Springs formation was of Upper 

 Cretaceous age. A re-examination of the type assem- 

 blages of the Lizard Springs formation, prepared by 

 H. H. Renz, shows that they include Guembelina 

 representing several Tertiary species {Chiloguembelina 

 crinita-midwayensis group, Chiloguembelina wilcoxensis 

 and Chiloguembelina trinitatensis), but do not contain 

 any Cretaceous species. It is not possible to identify 

 with certainty the figmres given by Cushman and 

 Renz (1946). Figure 1 on plate 6 of their paper is 

 probably a Chiloguembelina crinita or midwayensis 

 strombijormis; figure 2 seems to be a different genus. 



Systematic Descriptions 



Foiu'teen species and subspecies of Chiloguembelina, 

 one species of Guembelitria and one species of Zeauvi- 

 gerina are here recorded. The following new species 

 and subspecies are described: 



Chiloguembelina midwayensis strombiformis, new sub- 

 species 



Chiloguembelina midwayensis subcylindrica, new sub- 

 species 



Chiloguembelina parallela, new species 



Chiloguembelina subtriangularis, new species 



Chiloguembelina victoriana, new species 



The figured types are deposited in the U. S. National 

 Museum in Washington. A duplicate set of the species 

 described in this paper is deposited in the Natural 

 History Museum, Basel, Switzerland. 



Localities 



The following list gives the localities for the samples 

 from which the figured holotype, paratypes and hypo- 

 types were obtained. The sample numbers given here 

 and in the explanations of the plates and text-figures 

 are the catalogue nimibers of the paleontological 

 collection of The Trinidad Oil Company. 



50315: About lY* mile southeast of the junction between the 

 Rio Claro-Guayaguayare Road and the road to the abandoned 

 Lizard Springs oilfield, southeast Trinidad (locality described 

 in detail by Cushman and Renz, 1946), in eastern tributary of 

 Ampelu River, 185 feet from its junction with Ampelu River, 

 collected by H. H. Renz (282). 



102301: 120 feet north of sample 50315, collected by K. W. 

 Barr (6972). 



177760; In ravine between Brasso-Taraana Road and Navet 

 River, central Trinidad, 1,450 feet south of milepost 12>5 of 

 Brasso-Tamana Road (see Bolli, 1957b, text-fig. 25), collected 

 byH. G. Kugler (8820). 



178162: 4,570 feet south of milepost 9% of Brasso-Tamana 



Road, central Trinidad; in small northern tributary of Nariva 

 River, 100 feet from its junction with the Nariva River (coor- 

 dinates N:313850 Unks; E:478580 links), collected by H. G. 

 Kugler (9073). 



193785: Cipero Coast, San Fernando, Trinidad, 475 feet 

 southwest of fixed point at northern end of coast section (BoUi, 

 1957c, text-fig. 19), collected by -J. B. Saunders (19). 



215702: Cipero Coast, San Fernando, Trinidad, 276 feet 

 southwest of fixed point at northern end of coast section, col- 

 lected by H. M. BoUi (313B). 



217995: 850 feet west of road junction between The Avenue 

 and Bon Accord Road, Pointe-a-Pierre, Trinidad, in cutting west 

 of tank 127, 200 feet north of The Avenue, collected by L. W. 

 Hawkins (408). 



221009: Same locality as 221995, collected by H. G. Kugler 

 (10781). 



223470-73 : Trinidad Petroleum Development Co. well Moruga 

 No. 15. south Trinidad (coordinates N:149878 links; E:497002 

 links) ; 223470 from core at 3,593-3,613 feet (upper part), 223472 

 from core at 3,720-3,740 feet, 223473 from core at 3,796-3,816 

 feet. 



228484: Left bank tributary of Cascas River, 180 feet from its. 

 junction with the Cascas River, Moruga, south Trinidad (co- 

 ordinates N:138700 links; E:435000 links), coUected by L. W. 

 Hawkins (1831). 



228674: Northeastern bank of tank farm at the old club site, 

 Pointe-a-Pierre, Trinidad (coordinates N:256950 links; E:380000 

 links), collected by H. G Kugler (10832). 



232705-6, 232994: The Trinidad Oil Company well Guaya- 

 guayare No. 159, southeast Trinidad (coordinates N:151361 

 links; E:654095 links); 232705 from core at 4,524-4,536 feet, 

 232706 from core at 4,778-4,790 feet, 232994 from core at 3,707- 

 3,713 feet. 



238622: Hospital Hill, San Fernando, Trinidad, on eastern 

 side of road leading from King's Wharf to Point Bontour (coor- 

 dinates N:234850 Unks; E:355650 links), coUected by H. M. 

 BoUi (636). 



240966: Branch of Pointe-a-Pierre Road, between Joga Grant 

 Street and Jarvis Street, San Fernando, Trinidad, 90 feet east 

 of southern end of Joga Grant Street, collected by H. G. Kugler 

 (9613). 



