ART. 14 FORAMINIFERA FROM TRINIDAD CUSHMAN AND JAEVIS 47 



GYROIDINA NITIDA (Reuss) 



Plate 14, Figures 2a-c 



Rotalina nltida Reuss, Geogu. Skizze Bohmen, vol. 2, pt. 1, p. 214, 1844; 

 Verstein. Bohm. Kreide, pt. 1, p. 35, pi. 8, fig. 52 ; pi. 12, figs. S, 20, 184.5--16. 

 Qyroidina sparksi White, Journ. Pal., vol. 2, p. 297, pi. 40, fig. 8, 1928. 



Our specimens may be referred to this somewhat variable species 

 of Reuss. The figures show the general characters, but there are in- 

 termediate forms that tend toward the following species. 



GYROIDINA GLOBOSA (v. Hagenow) 



Plate 14, Figures 3, 4 



Nonionina glohosa v. Hagenow, Neues Jahrb. fur Min., 1842, p. 574. 



Rotalia gJobdsa Reuss, Sitz. Akad. Wiss. Wien, vol. 44, pt. 1, p. 330, pi. 7, figs. 



2 a, &, 1861 (1862). 

 Qyroidina naranjocnsis White, Jouin. Pal., vol. 2, p. 296, pi. 40, fig. 5, 1928. 



In its typical form this species has a very broadly rounded periph- 

 ery, and the ventral side is deep. Intermediate forms seem to be 

 present between this and the preceding species. The form is widely 

 distributed in the Upper Cretaceous. 



Genus EPONIDES Montfort, 1808 



EPONIDES HAIDINGERII (d'Orbigny) 



Plate 14, Figures 5 a~o 



Rotalina haidingerii d'Orbigny, Foram. Foss. Bass. Tert. Vienne, p. 154, pi. 8, 

 figs. 7-9, 1846. 



Test nearly circular in outline, in side view with a fairly high 

 spire, dorsal side very convex, ventral side flattened or sometimes 

 somewhat concave, periphery rounded; chambers in several whorls, 

 about six or seven in the adult whorl, distinct, slightly inflated on 

 the ventral side; sutures on the dorsal side slightly limbate, oblique, 

 flush with the surface, on the ventral side slightly depressed, nearly 

 radiate; wall smooth, distinctly perforate; aperture ventral between 

 the umbilicus and the periphery, with a slight lip. Diameter, 0.5-0.8 ; 

 height, 0.3-0.35 mm. 



The Trinidad specimens are very close to d'Orbigny's species from 

 the Vienna Basin and seem to be identical with it. Similar specimens 

 occur in the Upper Cretaceous of the Gulf Coastal Plain of the 

 United States. 



