FOrAMINIFERA of the ATLANTIC OCEAN 



27 



the Belgian coast. The blue-white color is characteristic and the 

 very smooth, translucent test. 



Discorbis nitida — Material examined 



DISCORBIS OBTUSA (d'Orbigny) (7) 



Plate 6, figures 2 a-c 



To this name Brady questionably refers a specimen from off 

 Ascencion Island. ^^ It somewhat resembles d'Orbigny's species 

 from the Vienna Basin, but is very smooth. Numerous later records 

 are given for D. obtusa from about the British Isles and in the North 

 Atlantic. I have specimens from the American coast north of 

 Cape Cod in the colder waters off New England that may be referred 

 here, but it is not typical. It is, however, perhaps the same as 

 the species of the North Atlantic and resembles d'Orbigny's figure, 

 except in the smoother test and smaller perforations. As shown in 

 Brady's figure, the earlier chambers and whorls are somewhat 

 obscured. 



Discorbis obtusa — Material examined 



Locality 



Off High Head, Casco Bay, Me.. 



Casco Bay, Me.. 



do 



Spar Landing, Frenchmans Bay, 

 Me. 



Hampton Beach, N. H 



Nahant Beach, Nahant, Mass..., 

 Drobach, Norway 



Depth, f,°^; 

 °°^« iture 



Character of 

 bottom 



Abundance 



Rare. 

 Do. 

 Do. 

 Do. 



Do. 

 Few. 

 Rare. 



DISCORBIS ORBICULARIS (Terquem) 



Plate 6, figures 3 a-c 



Rosalina orbicularis Terquem, Anim. sur la Plage de Dunkerque, 1876, 

 p. 75, pi. 9, figs. 4, a, b. 



Discorbis orbicularis Berthelin, Foram. de Borgneuf et Pornichet, 1878, 

 p. 39, No. 63.— CusHMAN, Bull. 71, U. S. Nat. Mus., pt. 5, 1915, p. 16, 

 pi. 11, fig. 1; Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 305; Publ. 311, 

 Carnegie Instit., Washington, 1922, p. 38, pi. 5, fig. 10. 



" Challenger Rep't., pi. 91, figs. 9 a-c. 



