50 PEOCEEDINQS OF THE NATIONAL MUSEUM vol.80 



distinct, very slightly depressed, radial ; wall smooth ; aperture at the 

 base of the apertural face of the chamber, either an elongate slit or 

 a somewhat constricted opening with a slight lip. Diameter, 0.35- 

 0.45 ; thickness, 0.2-0.25 mm. 



This species has been recorded from Cretaceous to Recent, and 

 there may be more than one species in the series, although there is 

 some variation in all the series studied. The figured specimen shows 

 well the common Cretaceous form, which is widely distributed in 

 Europe and America. 



PULLENIA CORYELLI White 



Plate 15, Figuees 5 a, 6 



Pullenia sphaeroides Cushman (not d'Orbigny), Bull. Amer. Assoc. Petr. Geol., 



vol. 10, p. 605, pi. 21, figs. 2 a, h, 1926. 

 Pullenia coryelU White, Journ. Pal., vol. 3, p. 56, pi. 5, fig. 22, 1929. 



Test subspherical, periphery very broadly rounded, slightly umbil- 

 icate ; chambers distinct but not inflated, six or seven in the final coil ; 

 sutures distinct, very slightly if at all depressed ; wall smooth ; aper- 

 ture an elongate curved slit, at the base of the apertural face. Diam- 

 eter, up to 0.5 mm. 



This seems to be a widely distributed form in the American Cre- 

 taceous, it being recorded from the Velasco shale of Mexico and also 

 occurring in Trinidad. 



Family GLOBIGERINIDAE 



Subfamily Globigerininae 



Genus GLOBIGERINELLA Cushman, 1927 



GLOBIGERINELLA sp. (?) 

 Plate 15, Figupes 6 «, & 



Rare specimens of this genus occur in the Trinidad Cretaceous, but 

 specimens are not in sufficient numbers and completeness to give full 

 characters for specific determination. 



Family GLOBOROTALIIDAE 

 Genus GLOBOTRUNCANA Cushman, 1927 



GLOBOTRUNCANA ARCA (Cushman) 



Plate 15, Figures 7 a-o 



PulvinuUna area Cushman, Contr. Cushman Lab. Foram. Res., vol. 2, p. 23, 

 pi. 3, figs. 1 a-c, 1926. 



Olobotruncana area Cushman, Contr. Cushman Lnb. Foi-am. Res., vol. 3, p. 91, 

 pi. 19, fig. 11, 1927; Journ. Pal., vol. 1, p. 169, pi. 28, fig. 28, 1927.— Moreman, 

 Journ. Pal., vol. 1, p. 100, pi. 16, figs. 16, 17, 1927.— Cushman and Church, 

 Proc. Calif oraia Acad. Sci., ser. 4, vol. 8, p. 518, pi. 41, figs. 1-3, 1929. 



Gloligerirw rosetta Carsey, Univ. Texas Bull. 2612, p. 44, pi. 5, figs. 3 c-c, 192a 



