6 PEOCEEDINGS OP THE NATIONAL MUSEUM vol. SO 



Genus PLANISPIRINA Seguenza, 1880 



PLANISPIRINA AURICULATA Egger 

 Plate 2, FiGtrRE 3 



Planispirina auriculata Cushman, U. S. Nat. Mus. Bull. 104, pt. 6, p. 93, 1929. 

 There is a single specimen, which is like those found in the West 

 Indian region and also in the Indo-Pacific, from station 8. This ex- 

 tends the western-Atlantic range of the species from the region of 

 Beaufort, S. C, on the north, to this station on the south. It is never 

 found apparently in any great numbers in the Atlantic, and its small 

 size also makes it rather easily overlooked. 



Family TROCHAMMINIDAE 

 Genus TROCHAMMINA Parker and Jones, 1860 



TROCHAMMINA GLOBIGERINIFORMIS (Parker and Jones) 



Plate 2, Figures 4 Or-c 



Trochammina gloMgeriniformis Cushman, U. S. Nat. Mus. Bull. 104, pt. 2, 

 p. 78, 1920. 



There are numerous specimens that may be referred to this species, 

 but, like the figured one, they are mostly compressed, and while the 

 chambers themselves are more or less globular, the entire test does 

 not have the high spire often characteristic of the species. The 

 figured specimen is from off St. Julian, Argentina, and we have 

 other specimens from the northward at stations 8 and 2. 



TROCHAMMINA ROTALIFORMIS J. Wright 



Plate 2, Figures 5 a-c 



Trochammina rotaliformis Cushman, U. S. Nat. Mus. Bull. 104, pt. 2, p. 77, 1920. 



A few specimens similar to that here figured, composed of several 

 coils with four or five chambers in each, are referred to this species. 

 They are from off the Falkland Islands. 



TROCHAMMINA PERUVIANA Cushman and Kcllett 



Plate 2, Figures 7 a-c 



Trochammina peruviana Cushman and KEaLLETT, Proc. U. S. Nat. Mus., vol. 75, 

 art. 25, p. 4, pi. 1, figs. 8a, ft, 1929. 



Test trochoid, spire greatly flattened, dorsally very slightly con- 

 vex, ventrally slightly concave, consisting of three or four whorls; 

 chambers numerous, 10 or more in the last-formed whorl, of rather 

 uniform size and shape, increasing slowly in size as added ; sutures on 



