20 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 



The original material of d'Orbigny came from the west coast of 

 South America, and apparently has a wide distribution along that 

 coast. A comparison of material from Chile and Peru, described in 

 the above reference, with the abundant material from along the coast 

 of South America and the Falklands, seems to show that they are 

 the same. D'Orbigny's Rotalina 'patagonica shows no trace of the 

 granulations in the sutures, but in the general form and appearance 

 it is very similar to much of the material occurring at the Falklands 

 and off the coast of Argentina, as well as northward at Rivadavia, 

 Brazil. D'Orbigny's figure of E. peruviana shows a form with more 

 numerous chambers and an acute periphery, the chambers on the 

 dorsal side limbate and on the ventral side radial and straight. An 

 examination of a great many specimens from both sides of South 

 America leaves one somewhat confused as to the name that should 

 be applied to these specimens. There seem to be gradations be- 

 tween them in several respects. Many of the specimens from the 

 Falklands, for instance, have the same number of chambers and a 

 rounded periphery similar to d'Orbigny's ^''fatagonica^'' but the 

 sutures are always practically radial, have a distinct depressed area, 

 which is finely granular, and frequently have along the periphery a 

 distinct, thickened, keel-like appearance. Probably the only way to 

 finally determine the status of these two species is to examine the 

 type specimens in the original d'Orbigny collection. 



Genus ROTALIA Lamarck, 1804 



ROTALIA BECCARII (Linnaeus) var, PARKINSONIANA (d'Orbigny) 



Rosalina parhinsoniana d'Orbigny, Hist. Fis. Pol. Nat. Cuba, " Foraminiferes," 



p. 99, pi. 4, figs. 25-27, 1839. 

 Rotalia heccarii (Linnaeus) var, parkinsoniana (d'Orbigny), Cushman and 



Cole, Contr. Cushman Lab. Foram. Res., vol. 6, p. 100, pi. 13, figs. 14 a-c, 



1930. 



In the West Indian region there is a distinctive form of Rotalia 

 to which d'Orbigny gave the specific name " parkinsoniana.^^ This is 

 apparently living, widely spread in the general West Indian region, 

 and from our material extends southward as far as Rio de Janeiro 

 Harbor, where it is common at all three stations. The same form 

 has been recorded in the above reference from the Pleistocene of 

 Maryland. 



Genus CANCRIS Montfort, 1808 



CANCRIS SAGRA (d'Orbigny) 



Cancris sagra Cushman, U, S. Nat. Mus. Bull. 104, pt. 8, pp. 74, 75, 1931. 



There are numerous, very typical specimens of this West Indian 

 species from all the stations in Rio de Janeiro Harbor, The series 



