64 SHALLOW-WATER FORAMINIFERA OF TORTUGAS REGION. 
ing in toward the center from opposite sides, each thickened toward the end, 
lip slightly everted, thin. 
Length of largest Tortugas specimens 1.25 mm. 
Q. agglutinans is very common in the region and is very similar 
to the specimens figured by d’Orbigny. His specimens were from 
Jamaica and Cuba, and I have found it to be common in the general 
West Indian region. Many different forms have been referred to 
this species by authors since d’Orbigny’s time, but in the West Indies 
at least there is a well-defined species which should bear this name. 
Specimens occurred at every one of the 20 stations in the Tortugas 
region. 
Quinqueloculina bidentata d’Orbigny. 
Quinqueloculina bidentata d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 
“Foraminiféres,’”’ p. 197, pl. 12,;figs. 18 to 20.—Cushman, Proc. U.S. Nat. Mus., 
vol. 59, 1921, p. 65, pl. 15, figs. 11, 12. 
Test somewhat longer than broad; chambers distinct; periphery squarely 
truncate; wall composed of rather coarse sand-grains; apertural end projecting, 
with a slightly thickened lip; aperture with a thin tooth with a broad, bifid tip. 
Length of largest Tortugas specimens 1.5 mm. 
This species originally described by d’Orbigny from Cuba, was 
found to be frequent at Runaway Bay, on the north coast of Jamaica, 
and has occurred at several stations in the Tortugas, although it is 
not nearly so common as Quinqueloculina agglutinans. 
Quinqueloculina alveoliniformis (H. B. Brady). 
Miliolina alveoliniformis H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 268; Rep. 
Voy. Challenger, Zoology, vol. 9, 1884, p. 181, pl. 8, figs. 15 to 20. 
Quinqueloculina alveoliniformis Cushman, Bull. 71, U. S. Nat. Mus., pt. 6, 1917, p. 43; 
Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 443; Proc. U. S. Nat. Mus., vol. 59, 
1921, p. 64. 
This is a species of coral-reef areas, in warm, tropical waters. The 
specimens from the West Indies are thicker and not so elongate nor 
so large as is characteristic of similar conditions in the East Indies 
and in the Philippines. It may be that this is a distinct variety in 
the West Indian region. Although found at several stations, it is 
never common, so far as the Tortugas collection shows. 
Quinqueloculina lamarckiana d’Orbigny. 
Quinqueloculina lamarckiana d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 
“‘Foraminiféres,”’ p. 189, pl. 11, figs. 14, 15.—Cushman, Proc. U. S. Nat. Mus., 
vol. 59, 1921, p. 65, pl. 15, figs. 13, 14. 
Quinqueloculina auberiana d’Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 
“ Foraminiféres,’’ p. 193, pl. 12, figs. 1 to 3. 
Quinqueloculina cuvieriana H. B. Brady (not d’Orbigny), Rep. Voy. Challenger, Zoology, 
vol. 9, 1884, p. 162, pl. 5, figs. 12 a to c. 
Test nearly as broad as long; chambers distinct; sutures slightly depressed; 
chambers generally triangular in transverse section, the angles subacute but 
not carinate; wall smooth and shiny; apertural end of the chamber slightly 
extended, forming an elliptical neck without a definite lip, but with a narrow 
elongate tooth. 
Length of the Tortugas specimens up to 1 mm. 
