14 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



This species is common at the Tortugas off Florida and is probably 

 widely distributed in the West Indian region. The figure in the 

 Challenger Report referred to above is not the same as the species 

 represented by d'Orbigny's Model. In the Tortugas region at least 

 there is very little variation, and the species is well defined. 



DISCORBIS ARAUCANA (d'Orbigny) 



This species was described by d'Orbigny from the coast of Chile. 

 I have not seen it in the material from the Western Atlantic, although 

 it occurs in the Pacific. The Atlantic records are "Cottage City, 

 Cape Cod" Marthas Vineyard, Woodward,^ Clare Island Region, 

 Ireland, Heron-Allen and Earland,* and Zuiderzee, Holland, Hofker." 

 I have had much material from the general region from which Wood- 

 ward's records were obtained, but have no specimens of this species. 

 Hofker's figures do not seem to be identical with d'Orbigny's species, 

 and Heron-Allen and Earland do not figure their specimens. Their 

 remarks are as follows: "A few specimens in two shore sands and one 

 dredging which appear to be referable to this species. It is not a 

 very satisfactory type, but serves as a connecting link between the 

 group of D. rosacea and D. globularis." 



DISCORBIS AUBERn (d'Orbigny) 



Rosalina auberii d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 



" Foraminif eres," p. 94, pi. 4, figs. 5-8. 

 Discorbis auberii Cushman, Proc. U. S. Nat. Mus., vol. 59, 1921, p. 59, pi. 14, 



figs. 1-3; Publ. 311, Carnegie Instit. Washington, 1922, p. 40; Publ. 344, 



1926, p. 78. 



Discorbis auberii — Material examined 



Test rotaliform, with a low spire, periphery carinate, acute, the 

 ventral side slightly if at all convex; chambers in several whorls 

 with four chambers in each; sutures distinct, somewhat depressed, 

 obhque on the dorsal side, nearly radiate on the ventral; wall rather 

 coarsely perforate; aperture a curved, narrow slit at the base of 

 the last-formed chamber. 



Diameter 0.40 mm. 



' The Observer, vol. 4, 1893, p. 176. 



' Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 126. 



' Flora en Fauni der Zuiderzee, Protozoa, 1922, p. 152, fig. 49 (in text). 



