42 BULLETIN 10 4, UNITED STATES NATIONAL MUSEUM 



Indo-Pacific, but its characters do not alwaj'^s seem constant in this 

 wide range, so possibly more than one species may be present. 

 Figures are given of both West Indian and European specimens. 



SPIROLOCULINA ORNATA d'Orbigny 



Plate 8, Figures 6 a-c 



Spiroloculina ornata d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 1839, " Foraminiferes, " p. 167, pi. 12, figs. 7, 7a. — Cushman, Proc. U. S. 

 Nat. Mus., vol. 59, 1921, p. 64; Publ. 311, Carnegie Instit. Washington, 

 1922, p. 60, pi. 10, fig. 9. 



Test elongate, compressed, concave in side view, the apertural end 

 projecting to a considerable distance beyond the rest of the test; the 

 last-formed chamber, and sometimes the one before, ornamented with 

 a secondary costa, running from near the apertural end backward near 

 the inner angle of the chamber; aperture quadrangular, with a single 

 narrow tooth; surface smooth, shining. 



Length, 1 mm.; breadth, 0.45 mm.; thickness, 0.10 mm. 



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

 Cuba. It has been found in material from Jamaica and the Tortu- 

 gas, and probably has a wider range in the West Indian region. It 

 is a very thin species with concave periphery. 



SPIROLOCULINA EXIMIA Cushman 



Plate 8, Figures 7 a, b 



Spiroloculina eximia CvsnuATSf , Publ. 311, Carnegie Instit. Washington, 1922, 

 p. 61, pi. 11, fig. 2; Publ. 342, 1924, p. 56, pi. 21, fig. 2. 



Test elongate, elliptical, periphery convex, the opposite faces con- 

 cave, ends of the chamber projecting; sutures fairly distinct, the 

 outer angle of each chamber projecting above the inner portion of the 

 adjacent next-formed chamber; wall with a granular, dull surface; 

 apertural end with a projecting cylindrical neck, circular, with a single, 

 very thin, slightly bifid tooth. 



Length, 0.60 mm.; breadth, 0.35 mm.; thickness, 0.18 mm. 



This species described originally from the West Indian region in 

 the Tortugas collections has also been found at Samoa. It is to be 

 suspected therefore that it will be eventually found to have a wide 

 range in both the West Indian region and in the Indo-Pacific. 



The surface is peculiar being coarsely granular and dull. 



SPIROLOCULINA CADUCA Cushman 



Plate 9, Figures 1,2 



Spiroloculina caduca Cushman, Publ. 311, Carnegie Instit. Washington, 1922, 

 p. 61, pi. 11, figs. 3,4. 



Test broadly elliptical, much compressed, the apertural end 

 extended; chambers of the adult with a sharp translucent keel, 

 usually somewhat lobulated; sutures slightly depressed, surface of 



