74 SHALLOW-WATER FORAMINIFERA OF TORTUGAS REGION. 
Triloculina gracilis d’Orbigny. 
Triloculina gracilis d’Orbginy, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, “ Forami- 
niféres,’’ p. 159, pl. 11, figs. 10 to 12. 
Test elongate, slender, triloculine; chambers rounded; sutures very slightly 
depressed; apertural end extended into a cylindrical neck, the outer end of 
which is enlarged and has a phialine lip; surface smooth or very finely striate; 
aperture circular, with a slight tooth. 
Length of the Tortugas specimens up to 0.50 mm. 
D’Orbigny described this species as rare, from shore sands of 
Cuba and Jamaica. I did not find it in the material that I examined 
from Montego Bay, Jamaica, but it has occurred at 4 stations in 
the Tortugas region. It is a very slender, delicate species, most 
easily characterized by the peculiar aperture. D’Orbigny’s figures 
of T. gracilis are fairly accurate, but they show more of a surface 
ornamentation than appears in our specimens. 
Triloculina transversestriata (H. B. Brady). 
Miliolina transversestriata H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 45; Rep. 
Voy. Challenger, Zoology, vol. 9, 1884, p. 177, pl. 4, figs. 6 a to c.—Millett, Journ. 
Roy. Micr. Soc., 1898, p. 268, pl. 6, fig. 5.—Heron-Allen and Farland, Trans. 
Zool. Soc. London, vol. 20, 1915, p. 566, pl. 42, figs. 17 to 20. 
Triloculina transversestriata Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 70. 
Test elongate, 2 to 3 times as long as broad; periphery subacute; surface 
ornamented by numerous obliquely transverse costz; apertural end slightly 
extended; aperture rounded, with a simple tooth. 
Length of the Tortugas specimens up to 0.70 mm. 
This is one of the species which connects this region with the 
Indo-Pacific. Brady’s original specimens were from Torres Strait 
and Mauritius. Millett records it from the Malay Archipelago, and 
Heron-Allen and Earland from the Kerimba Archipelago, off the 
east coast of Africa, as well as from the Great Barrier Reef of Aus- 
tralia. They also record specimens from Havana, Cuba, and I have 
had a single specimen from Montego Bay, north coast of Jamaica. 
In the Tortugas collection this species is represented by single speci- 
mens from two stations, but they are typical. 
Triloculina planciana d’Orbigny. 
Triloculina planciana d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, “ Forami- 
niféres,”’ p. 173, pl. 9, figs. 17 to 19.—Cushman, Proc. U. S. Nat. Mus., vol. 59, 
1921, p. 70, pl. 17, figs. 7, 8. 
Test elongate; chambers distinct; sutures slightly, if at all, depressed; 
periphery broadly rounded; wall ornamented by numerous short, incised 
lines; aperture rounded, with a bifid tooth, projecting slightly above the 
apertural opening; surface shiny. 
Length of the Tortugas specimens up to 0.65 mm. 
D’Orbigny described this species from Cuba and Jamaica, and I 
found specimens in the collection from the north coast of Jamaica, 
at Montego Bay, and also at Runaway Bay. It has occurred at 
three-fourths of the stations in the Tortugas region. The peculiar 
