166 



UNITED STATES NATIONAL MUSEUM BXJIiliETIN 215 



of specimens sinistral in the Porticulasphaera mexicana 

 zone. Largest diameter of holotype 0.37 mm. 



Steatigkaphic range: Globorotalia lehneri zone to 

 Truncorotaloides rohri zone, Navet formation. 



Locality: Holotype (USNM P5729) and figured 

 paratypes (USNM P5730a-c) from the Porticulas- 

 phaera mexicana zone, Navet formation; same locality 

 as given for Hastigerina micra (Cole) (p. 161); sample 

 Hg 8581 (TTOC 215782). 



Remarks: Catapsydrax echivMus, new species, is 

 distinguished from C. dissimilis (Cushman and Ber- 

 mudez) and C. unicams BoUi, Loeblich, and Tappan 

 by having a distinctly spinose surface. This type of 

 surface ornamentation is characteristic for many upper 

 Paleocene to middle Eocene planktonic species. The 

 bulla, which varies considerably in size may be smooth 

 (see fig. 5b) or spinose (see figs. 2b, 3b). Most speci- 

 mens observed are smaller than the average size of 

 G. of. dissimilis found in the upper part of the Navet 

 and San Fernando formations. 



Catapsydrax unicavus Bolli, Loeblich, and Tappan 



Plate 37, Figures 7a-b 



Catapsydrax unicavus Bolli, Loeblich, and Tappan. U. S. 

 Nat. Mus. BuU. 215, p. 37, pi. 7, figs. 9a-c, 1957. 



Stratigraphic range: Truncorotaloides rohri zone, 

 Navet formation to Catapsydrax stainforthi zone, 

 Cipero formation. 



Locality: Figured specimen (USNM P5732) from 

 the Truncorotaloides rohri zone, Navet formation; 

 near junction of small ravine with Navet River (see 

 text fig. 25) ; sample K 8833 (TTOC 177772). 



Catapsydrax cf. dissimilis (Cushman and Bermudez) 



Plate 37, Figures 6a-b 



Stratigraphic range: Truncorotaloides rohri zone, 

 Navet formation to Catapsydrax stainforthi zone, 

 Cipero formation. 



Locality: Figured specimen (USNM P5731) from 

 the type locality of the Globigerapsis semiinvoluta zone, 

 Navet formation (see p. 159); sample Ky 7 (TTOC 

 144343). 



Remarks: The middle and upper Eocene forms 

 differ from the Catapsydrax dissimilis of the Oligocene- 

 lower Miocene in having somewhat more globular 

 chambers. The umbilical bullae have commonly only 

 two and more rarely only one infralaminal accessory 

 aperture, whereas the bullae of Oligocene-lower Mio- 

 cene specimens often display three or four accessory 

 apertures. C. unicavus BoUi, Loeblich, and Tappan, 

 whose bulla has one accessory aperture, is smaller in 

 size and its chambers are less inflated than those found 

 in C. cf. dissimilis. The direction of coiling in the 

 Eocene specimens is apparently random, whereas the 

 Oligocene-lower Miocene specimens show a strong 

 preference for dextral coiling 



Genus Globigerinatheka Bronnimann, 1952 

 Globigerinatheka barri Bronnimann 



Plate 37, Figures 8-9 



Globigerinatheka barri Bronnimann, Contr. Cushman Found. 



Foram. Res., vol. 3, pt. 1, pp. 27-28, text figure 3a, 1952.— 



Bolli, Loeblich, and Tappan, U. S. Nat. Mus. Bull. 



215, p. 38, pi. 7, figs. 12a-c, 1957. 

 Globigerinoides mexicana (Cushman), Beckmann, Eclog. Geol. 



Helvetiae, vol. 46, No. 2, p. 393, pi. 25, fig. 16, 1953. 



Stratigraphic range: Globorotalia lehneri zone to 

 Globigerapsis semiinvoluta zone, Navet formation, 

 IGloborotalia cocoaensis zone, San Fernando formation. 



Locality: Figured hypotypes (USNM P5733a,b) 

 from the Porticulasphaera mexicana zone, Navet forma- 

 tion; same locality as given for Hastigerina micra (Cole), 

 p. 161, sample Hg 8581 (TTOC 215782). 



Genus Globorotaloides BoUi, 1957 

 Globorotaloides suteri Bolli 



Plate 37, Figures lOa-12 



Globorotaloides suteri Bolli, U. S. Nat. Mus. BuU. 215, p. 117, 

 pi. 27, figs. 9a-13c, 1957. 



Stratigraphic range: Porticulasphaera mexicana 

 zone, Navet formation to Globigerinatella insueta zone, 

 Cipero formation. 



Locality: Figured hypotypes (USNM P5734a-c) 

 from the Porticulasphaera mexicana zone, Navet forma- 

 tion; same locality as given for Hastigerina micra (Cole) 

 (p. 161); sample Hg 8581 (TTOC 215782). 



Family Globorotaliidae Cushman, 1927 



Genus Globorotalia Cushman, 1927 



Globorotalia pahnerae Cushman and Bennudez 



Plate 38, Figures 2a-c 



Globorotalia palmerae Cushman and Bermudez, Contr. Cush- 

 man Lab. Foram. Res., vol. 13, p. 26, pi. 2, figs. 51-53, 

 1937. — Bermudez, Mem. Soc. Cubana Hist. Nat., vol. 11, 

 p. 167, 1937; vol. 12, p. 11, 1938. — Cushman and Bermudez, 

 Contr. Cushman Lab. Foram. Res., vol. 25, pt. 2, pp. 31-32, 

 pi. 6, figs. 4r-6, 1949. 



Stratigraphic range: Globorotalia palmerae zone, 

 Navet formation. 



Locality: Figured hypotype (USNM P5740) from 

 the type locality of the Globorotalia palmerae zone, 

 Navet formation (see p. 156) ; sample from core 9,386- 

 9,405 feet (TTOC 228911). 



Remarks: The preservation of the specimens found 

 so far in Trinidad is poor; the characteristic Hantke- 

 nina-hke peripheral spines are partially eroded. 



Globorotalia aspensis (Colom) 



Plate 37, Figures 18a-c 



Globigerina aspensis Colom, Bol. Inst. Geol. y Min. Espafia, 

 vol. 66, pp. 151-54, pi. 3, figs. 1-5, pi. 4, figs. 1-3, 1964. 



Stratigraphic range: Globorotalia palmerae zone to 

 Globigerapsis kugleri zone, Navet formation. 



