66 BULLETIN" 104, UNITED STATES NATIONAL MUSEUM 



Length, 1.50 mm.; breadth, 0.65 mm.; thickness, 0.35 mm. 



This species was described by d'Orbigny from shore sands of Cuba 

 as rare. It is, however, a common and widely distributed species of 

 the West Indian region. The surface reticulations are very regular in 

 size and position. The periphery in this species is carinate while in 

 the following one it is truncate with double keels. In some specimens 

 of T. carinata, the periphery in the adult becomes rounded. 



TRILOCULINA BICARINATA d'Orbigny 



Plate 17, Figure 5 



Triloculina hicarinata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 1839, " Foraminiferes," p. 158, pi. 10, figs. 18-20.— Cushman, Publ. 311, 

 Carnegie Instit. Washington, 1922, p. 76, pi. 12, fig. 7; Publ. 344, 1926, 

 p. 83. 



Test longer than broad, triloculine, typically with the chambers 

 with a truncate periphery, the angles somewhat extended; chambers 

 distinct; sutures somewhat depressed; surface ornamented by retic- 

 ulations both on the sides and on the outer angles; aperture elongate, 

 with a definite thin lip, slightly everted, tooth elongate, narrow, 

 extending above the outline of the aperture. 



Length, 1.4 mm.; breadth, 0.80 mm.; thickness, 0.50 mm. 



This species was described by d'Orbigny from shore sands of Cuba, 

 I did not find it in Jamaica but it has occurred at Porto Rico and at 

 the Tortugas. It is close to the preceeding species but differs as 

 already noted in the shape of the chambers and also in the surface 

 markings. Those of T. hicarinata are more or less rectangular while 

 those of T. carinata are usually rounded or elliptical. 



TRILOCULINA MACULATA (Egger) 



Miliolina maculata Egger, Abhandl. kon. bay. Akad. Wiss. Miinchen, CI. II, 

 vol. 18, 1893, p. 238, pi. 2, figs. 85, 86. 



Egger describes this species from the West Coast of Africa in 677 

 fathoms. The original figure is rather poor and the species is men- 

 tioned here for the Atlantic record. 



Genus TRILLINA Munier-Chalmas and Schlumberger, 1893 



Trillina Munier-Chalmas and Schlumberger (Genoholotype, Trillina 

 howchini Schlumberger), Bull. Soc. Geol. France, ser. 3, vol. 21, 1893, 

 p. 118. — Cushman, Special Publ. No. 1, Cushman Lab. Foram. Res., 1928, 

 p. 154. 



Test similar in plan of development to Triloculina, but with the 



chambers labyrinthic and the aperture cribrate. 



Eocene. 



Genus FLINTINA Cushman, 1921 



Flintina Cushman (Genoholotype, Flintina bradyana Cushman), Bull. 100, 

 U. S. Nat. Mus., vol. 4, 1921, p. 465; Special Publ. No. 1, Cushman Lab. 

 Foram. Res., 1928, p. 154. 



Miliolina (part) H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 pp. 169, 184. 



