FORAMINIFERA OF THE ATLANTIC OCEAN 23 



umbilical regions each with a large rounded boss, in peripheral view- 

 protruding strongly beyond the outline of the test; chambers only 

 slightly inflated, distinct, averaging about 10 in number in the last- 

 formed coil; sutures slightly depressed, somewhat broadening toward 

 the inner end, marked also by the retral processes which are short, 

 and 10 to 12 in number; wall smooth, very distinctly perforate, 

 umbos of clear shell material, nearly transparent, with numerous 

 coarse tubules; aperture composed of several, small, rounded openings 

 at the base of the apertural face. 



Diameter, 0.65 mm.; thickness, 0.30 mm. 



D'Orbigny described this species from shore sands from Cuba and 

 Jamaica, recording it as common. It has a general West Indian 

 distribution. 



The species is close to E. lanieri (d'Orbigny), and is to be distin- 

 guished from it mainly by the less prominent retral processes, the 

 more depressed sutures, the more prominent umbos, and the smaller 

 number of chambers. 



ELPHIDIUM LANIERI (d'Orbigny) 



Plate 9, figure 7 



Polystomella lanieri d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 

 1839, "Foraminifdres," p. 54, pi. 7, figs. 12, 13.— Cushman, Publ. 291, 

 Carnegie Instit. Washington, 1919, p. 49. 



Test of medium size for the genus, periphery subacute, margin 

 entire, not lobulate; sides convex in peripheral view giving a rhomboid 

 outline to the test, umbilical regions each with a large rounded boss 

 in peripheral view forming the greatest width of the test but con- 

 tinuous with the sides; chambers not inflated, distinct, numerous, 

 averaging 18 to 20 in the last-formed coil; sutures not depressed, 

 marked by the retral processes which are short, 10 to 12 in number 

 and slightly oblique, those of the earlier portion tending to merge 

 into oblique lines; wall smooth, distinctly perforate, translucent, the 

 bosses of clear material with numerous tubular perforations ; aperture 

 composed of several, small, rounded openings at the base of the 

 apertural face. 



Diameter, 0.60 mm.; thickness, 0.40 mm. 



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

 I have recorded it from the Late Tertiary of Rio Cana, Cercado de 

 Mao, Santo Domingo and from the gorge of the Yumuri River, 

 Matanzas, Cuba. The specimens I have noted from Porto Rico and 

 from the Miocene of Yellow River, Florida, belong under E. sagrum 

 (d'Orbigny) as noted under that species. 



In the earlier work on the Recent West Indian collections, I often 

 included E. lanieri and E. discoidale under the latter species. 



