162 



UNITED STATES NATIONAL MUSEUM BULLETIN 215 



Kemarks: Clavigerinella akersi Bolli, Loeblich, and 

 Tappan is distinguished from C. jarvisi (Cushman) by 

 having the later, elongate chambers distinctly inflated 

 at the outer ends. It is more restricted in its range and 

 may be regarded as a characteristic index fossil. 



Fetters (1954, p. 40) described Hastigerinella colum- 

 hiana from the middle Eocene Carreto formation of 

 Colombia. The figures for the species show the cham- 

 bers to be club-shaped though not as distinctly so as 

 in ClavigerineUa akersi; the aperture is not visible on 

 the figure, but is described as "a rather wide arched 

 slit with a slight lip at base of last-formed chamber, 

 slightly ventrally of periphery." Similar or identical 

 forms possessing an equatorial aperture which occur in 

 the middle Eocene of Trinidad couJd possibly represent 

 a juvenile stage of Clavigerinella akersi or an inter- 

 mediate stage between C. jarvisi and C. akersi. (See 

 pi. 35, figs. 3a,b; specunen (USNM P5700) from the 

 Hantkenina aragonensis zone, Navet formation, between 

 nuleposts 12}^ and 12% of the Brasso-Tamana Koad, 

 Central Kange, sample K 8775 (TTOC 177647).) 

 It may also be assumed that Hastigerinella eocanica 

 Nuttall belongs to Clavigerinella, although the aperture 

 is not preserved on the types figured by Nuttall. 



Clavigerinella jarvisi (Cushman) 

 Plate 35, Figures 5-6 



Hastigerinella jarvisi Ctjshman, Cushman Lab. Foram. Res., 



vol. 6, p. 18, pi. 3, figs. 8-11, 1930. 

 Hastigerinella eocanica var. aragonensis Nuttall, Journ. Pale- 



ontoL, vol. 4, No. 3, p. 290, pi. 24, figs. 16, 17, 1930. 



Stratigeaphic range: Hantkenina aragonensis zone 

 to Globigerapsis semiinvoluta zone, Navet formation. 



Locality: Figured hypotypes (USNM F5701a,b) 

 from the Globorotalia lehneri zone, Navet formation; 

 Navet River marl and Fitt Trace marl (see Cushman 

 and Eenz, 1948, p. 3); samples KE 4347, KS 233 

 (TTOC 1285, 18360). 



Family Orbulinidae Schultze, 1854 



Subfamily Globigerininae Carpenter, 1862 



Genus Globigerina d'Orbigny, 1826 



Clobigerina soldadoensis Bronnimann 



Plate 35, Figures 9a-c 



Globigerina soldadoensis Bronnimann, Bull. Amer. Paleontol., 

 vol. 34, No. 143, pp. 9-11, pi. 1, figs. 1-9, 1952.— Bolli, 

 U. S. Nat. Mus. Bull. 215, p. 71, pi. 16, figs. 7-12, 1957. 



Stratigeaphic range: Globorotalia velascoensis zone. 

 Lizard Springs formation to Globorotalia palmerae 

 zone, Navet formation. 



Locality: Figured hypotype (USNM P5704) from 

 the Oloborotalia palmerae zone, Navet formation; Pit 

 sample from a block reworked in the Oligocene-Miocene 

 Cipero formation; 2,900 feet south of the Naparima- 

 Mayaro Road and Corial Road junction, Malgretout 

 Estate, west of Princes Town, south Trinidad (coordi- 

 nates N:235390 links; E:398620 links); sample KTO 

 145 (TTOC 143701). 



Clobigerina soldadoensis angulosa Bolli 



Plate 35. Figures 8a-c 



Globigerina soldadoensis angulosa Bolli, U. S. Nat. Mus. BuU. 

 215, p. 71, pi. 16, figs. 4-6, 1957. 



Stratigeaphic eange: Globorotalia Jormosa jormosa 

 zone, Lizard Springs formation to Globorotalia palmerae 

 zone, Navet formation. 



Locality: Figured hypotype (USNM P5703) from 

 the Globorotalia palmerae zone, Navet formation; same 

 locality as given for Globigerina soldadoensis Bronni- 

 mann; sample KTO 145 (TTOC 143701). 



Remaeks: Transitional forms indicate that Globi- 

 gerina soldadoensis angulosa is likely to be the ancestor 

 of Globorotalia aspensis (Colom) . 



Clobigerina coUactea (Finlay) 

 Plate 35, Figures 18a-b 



Globorotalia coUactea Finlay, Trans. Proc, Roy. Soc. New 

 Zealand, vol. 69, p. 37, pi. 29, figs. 164-165, 1939. 



Globigerina coUactea (Finlay), Bronnimann, Bull. Amer. Paleon- 

 tol., vol. 34, No. 143, pp. 13-14, pi. 1, figs. 13-15, 1952.— 

 Bolli, U. S. Nat. Mus. BuU. 215, p. 72, pi. 15, figs. 21-23, 

 1957. 



Steatigeaphic eange: Globorotalia rex zone, Lizard 

 Springs formation to Globorotalia palmerae zone, Navet 

 formation. 



Locality: Figured hypotype (USNM P5710) from 

 the Globorotalia palmerae zone, Navet formation; same 

 locality as given for Globigerina soldadoensis Bronni- 

 mann; sample KTO 145 (TTOC 143701). 



Clobigerina prolata Bolli 



Plate 35, Figures 7a-b 



Globigerina prolata Bolli, U. S. Nat. Mus. Bull. 215, p. 72, pi. 15, 



figs. 24^26, 1957. 

 Globigerina pseudobulloides Plummer, Bronnimann, Bull. Amer. 

 Paleontol., vol. 34, No. 143, pp. 21-23, pi. 3, figs. 7-9, 1952. 



Stratigeaphic range: Globorotalia formosa formosa 

 zone, Lizard Springs formation to Globorotalia palmerae 

 zone, Navet formation. 



Locality: Figured hypotype (USNM P5702) from 

 the Globorotalia palmerae zone, Navet formation ; same 

 locality as given for Globigerina soldadoensis Bronni- 

 mann; sample KTO 145 (TTOC 143701). 



Clobigerina turgida Finlay 

 Plate 35, Figures 13a-c 



Globigerina turgida Finlay, Trans. Proc, Roy. Soc. New Zealand, 

 vol. 69, p. 125, 1939. — Bronnimann, Bull. Amer. Paleontol., 

 vol. 34, No. 143, pp. 19-21, pi. 3, figs. 1-3, 1952.— Bolli, 

 U. S. Nat. Mus. Bull. 215, p. 73, pi. 15, figs. 3-5, 1957. 



Steatigeaphic eange: Globorotalia aragonensis zone, 

 Lizard Springs formation to Hantkenina aragonensis 

 zone, Navet formation. 



Locality: Figured hypotype (USNM P5706) from 

 the Globorotalia palmerae zone, Navet formation; 

 same locality as given for Globigerina soldadoensis 

 Bronnunann; sample KTO 145 (TTOC 143701). 



