ABT. 3 SOUTH AMERICAN FORAMINIFEKA GUSH MAN AND PARKER 19 



small specimens is here figured, which, although not quite typical, 

 is probably to be assigned to this species. 



DISCORBIS MFRA Cushman 



Dlscorbis mira Ctishman, U. S. Nat. Mus. Bull. 104, pt. 8, pp. 25, 26, 1931. 



A very few but very typical specimens occur in Rio de Janeiro 

 Harbor. As this is typically a West Indian species, it would not be 

 expected in the colder-water material. 



DISCORBIS CANDEIANA (d'Orbigny) 



DiscorMs candeiana Cushman, U. S. Nat. Mus. Bull. 104, pt. 8, p. 19, 1931. 



There are rare specimens of this species described by d'Orbigny 

 from the West Indies occurring with the preceding species. 



DISCORBIS NITIDA (Williamson) 



Plate 4, Figures 4 a-c 



DiSGorlis nitida Cushman, U. S. Nat. Mus. Bull. 104, pt. 8, pp. 26, 27, 1931. 



The figured specimen shows a typical specimen of a form that 

 is here assigned to Williamson's species. It shows some differences, 

 in that our form usually has fewer chambers, and the ventral por- 

 tion has a somewhat more lobed appearance. Otherwise, however, 

 it seems to be very close to this species as developed off the British 

 Isles, and a comparison of specimens from the two areas shows very 

 little difference, except in the points noted. Our specimens are most 

 abundant at the three stations in Rio de Janeiro Harbor, but some- 

 what similar ones occur at Port William in the Falklands, this being 

 one of the few forms which occurs in the two areas. 



Genus EPONIDES Montfort, 1808 



EPONIDES PERUVIANUS (d'Orbiffny) 



Rosalina peruviana d'Orbigny, Voyage dans I'Am^rique Meridiouale, vol. 5, 



pt. 5, " Foraminiferes," p. 35, pi. 2, figs, a-5, 1839. 

 Eponides peruviana Cushman and Kei.lett, Proc. U. S. Nat. Mus., vol. 75, art. 



25, p. 10, pi. 4, figs. 5a-c, 1929. 



Test trochoid, nearly equally biconvex, periphery carinate, gener- 

 ally circular in outline; chambers numerous, distinct, about eight in 

 the last-formed whorl, on the dorsal side forming a very even, 

 polished surface, ventrally inflated, giving a very distinct appearance 

 to the test ; sutures very distinct on the dorsal side, curved, flush with 

 the surface, slightly limbate, on the ventral side radial, depressed; 

 wall smooth, very finely perforate ; aperture ventral, at the base of the 

 chamber between the periphery and the umbilicus. 



