24 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



ELPHIDIUM SAGRUM (d'Orbljjny) 



Plate 9, figures 5-6 



Polystomella sagra d'Orbignt, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 1839, "Foraminif^res", p. 55, pi. 6, figs. 19, 20.— Cushman, Bull. 103, 

 U. S. Nat. Mus., 1918, p. 75, pi. 26, figs. 5 a, b; Publ. 291, Carnegie Inst., 

 Washington, 1919, p. 49; U. S. Geol. Survey, Prof. Paper 128-B, 1920, 

 p. 71, pi. 11, figs. 20, 21. 



Polystomella lanieri Cushman (not d'Orbigny), U. S. Geol. Survey, Prof. 

 Paper 128-B, 1920, p. 72, pi. 11, fig. 22; Publ. 344, Carnegie Instit. 

 Washington, 1926, p. 80. 



Test of small size for the genus, periphery broadly rounded, margin 

 entire, not lobulate, sides convex in peripheral view, the last-formed 

 portion wider than the earlier portions, umbilical regions depressed; 

 chambers in the last portion slightly inflated, fairly distinct, 12 to 

 15 in the last-formed coil; sutures not depressed, except between the 

 last few chambers, marked by the retral processes about 10 in num- 

 ber, short and broad, continuous over the earlier portion of the test 

 to form ridges slightly oblique to the periphery; wall fairly thick, 

 perforate; aperture composed of a series of small, rounded openings 

 at the base of the apertural face. 



Diameter, 0.55 mm. ; thickness, 0.33 mm. 



D'Orbigny 's types of this species were from shore sands of Cuba 



where it is recorded as rare. It occurs very rarely in the Recent 



collections from the West Indian region but seems to be more common 



in the Late Tertiary of the same region, occurring in Florida, Cuba, 



and Santo Domingo. The character of the distinct costae and the 



shape in peripheral view will distinguish this species from others in 



the region. 



Elphidium sagrum — Material examined 



