62 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



Test typically with three 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 simple or 

 bifid tooth. 



Length, 1.6 mm.; breadth 0.90 mm.; thickness 0.70 mm. 



This is a fine, large, well-characterized species especially well devel- 

 oped in the West Indian region. D'Orbigny's originals ca,me from 

 shore sands of Cuba and Jamaica. It is apparently widely distributed 

 in the Indo-Pacific and there are many references for it although they 

 are not given here until a study of sections shall show that the two 

 are really the same species. 



The tooth in side view projects beyond the outline of the test and 

 often has a large perforation as seen in one of the figures given. 



TRILOCULINA PLANCIANA d'Orbigny 



Plate 15, Figures 5, 6 



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

 ]839, " Foraminiferes," p. 173, pi. 9, figs. 17-19.— Cushman, Proc. U. S. 

 Nat. Mus., vol. 59, 1921, p. 70, pi. 17, figs. 7, 8; Publ. 311, Carnegie 

 Instit. Washington, 1922, p. 74; Publ. 344, 1926, p. 83. 



Test elongate; chambers distinct; sutures slightly, if at all, 

 depressed; periphery broadly rounded; wall ornamented by numer- 

 ous short, incised lines; aperture rounded, with a bifid tooth, project- 

 ing slightly above the apertural opening; surface polished. 



Length, 0.65 mm.; breadth, 0.35 mm.; thickness, 0.30 mm. 



This species was originally described by d'Orbigny from Cuba and 

 Jamaica. It has been found in my material from Montego Bay 

 and Runaway Bay on the north coast of Jamaica, from Porto Rico, 

 and from numerous stations in the Tortugas region. 



The surface is peculiarly marked with short incised lines but these 

 are a constant character. 



TRILOCULINA TRANSVERSESTRIATA (H. B. Brady) 



Plate 16, Figure 3 



Miliolina transversestriata H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 

 1881, p. 45; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 177, pi. 4, figs. 

 6 a-c. — MiLLETT, Journ. Roy. Micr. Soc, 1898, p. 268, pi. 6, fig. 5. — 

 Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, 1915, p. 

 566, pi. 42, figs. 17-20. 



Triloadina transversestriata Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, 

 p. 70; Publ. 311, Carnegie Instit. Washington, 1922, p. 74; Publ. 344, 

 1926, p. 82. 



Test elongate, two to three times as long as broad; periphery sub- 

 acute; surface ornamented by numerous obliquely transverse costae; 

 apertural end slightly extended; aperture rounded, with a simple 

 tooth. 



