MILIOLIDAE—TRILOCULINA. 75 
surface markings in 7’. planciana seem to be a constant character and, 
together with the broadly rounded form of the era. make it 
distinct from any other species of the region. 
Triloculina fichteliana d’Orbigny. 
Triloculina fichteliana d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, ‘‘ Forami- 
niféres,’”’ p. 171, pl. 9, figs. 8 to 10—Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 
1917, p. 71; Proc. U.S. Nat. Mus., vol. 59, 1921, p. 70, pl. 17, figs. 1, 2. 
Test subcircular in front view, somewhat compressed; periphery rounded; 
chambers distinct; sutures slightly depressed; wall ornamented by numerous 
longitudinal cost; aperture semicircular, with a slight tooth. 
Diameter of the Tortugas specimens up to 0.60 mm. 
This species, which was described by d’Orbigny from Cuba and 
Jamaica, is apparently widely distributed in the West Indian region. 
I have had specimens from shallow water off the north coast of 
Jamaica, and it has occurred at several stations in the Tortugas 
collection, but not in any considerable numbers. Our specimens are 
much more like the type as figured by d’Orbigny than the specimens 
figured by later authors, in the Challenger report and elsewhere. 
Triloculina carinata d’Orbigny. 
(Plate 12, Figure 6.) 
Triloculina carinata d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, ‘‘ Forami- 
niféres,”’ p. 179, pl. 10, figs. 15 to 17.—Cushman, Proc. U. S. Nat. Mus., vol. 59, 
1921, p. 71, pl. 17, figs. 9, 10. 
Test longer than broad; surface in the adult made up of three chambers, 
typically with the periphery carinate, with the surface ornamented with 
small rounded pits in regular series, covering the entire surface, except about 
the aperture; sutures distinct, somewhat depressed; aperture elongate, nar- 
row, with a distinct, slightly everted lip, tooth very long and narrow, project- 
ing somewhat above the apertural opening. ¢ 
Length of the Tortugas specimens up to 1.50 mm. 
D’Orbigny described this species from Cuba asrare. I had speci- 
mens from the north coast of Jamaica, where it is very common. 
It has been found at numerous stations in the Tortugas region and 
seems generally to be well distributed in the West Indies. While 
the typical form has carinate margins, it is not unusual to find in 
adults that the chambers become rounded. The reticulations are 
very regular in their position and size. 
Triloculina linneiana d’Orbigny. 
Triloculina linneiana d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, ‘' Forami- 
niféres,"’ p. 172, pl. 9, figs. 11 to 13.—Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 
1917, p. 72, pl. 27, fig. 4; Proc. U.S. Nat. Mus., vol. 59, 1921, p. 70, pl. 17, figs. 3, 4. 
Miliolina linneiana H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 174, pl. 6, 
figs. 15 to 20. 
Test typically with 3 visible chambers in the adult, elongate, tapering 
toward either end, somewhat depressed; surface ornamented by a few very 
prominent, raised ridges, with deep, concave depressions between; periphery 
rounded or slightly elliptical, with a single or bifid tooth. 
Length of the Tortugas specimens up to 1.5 mm. 
