FORAMINIFERA OF THE ATLANTIC OCEAN. 



155 



Description. — Test compressed, of few chambers, one side convex, 

 the otlier nearly flat and expanded, apparently forming the attach- 

 ment to the surface of some foreign body; surface smooth; sutures 

 distinct, but very slightly if at all depressed; aperture radiate. 



Diameter of the main portion usually not more than 0.60 mm. 



Distribution. — This species was originally described from the coast 

 of the British Isles by Williamson. Most of the records for it are 

 from the same general region and in the Mediterranean. I have had 

 what seems to be the same species from the Woods Hole region. 



POLYMORPHINA FLINTII. new species. 



Plate 40, fig. 10. 



Polymorphina compressa Flint (not D'Orbigny), Rep. U. S. Nat. Mus., 1897 

 (1899), p. 319, pi. 07, fig. 3. 



Description. — Test oval or somewhat rhomboid, compressed ; cham- 

 bers arranged in an irregular biserial manner, four or five chambers 

 on each side in the adult, chambers somewhat inflated; sutures dis- 

 tinct, but very slightly depressed; wall smooth and polished, thick; 

 aperture terminal, radiate. 



Length up to 2.30 mm. 



DistHhution. — Type-specimen (U.S.N.M. Cat. No. 17691) from 

 Albatross station D2415, in 440 fathoms (805 meters), off the coast 

 of Georgia. Flint recorded this species as P. compressa from several 

 stations off the southeastern coast of the United States, from Cape 

 Hatteras southward. I have had specimens from Albatross stations 

 from the region southward from Nantucket to the Florida coast. 

 Brady records P. compressa from two stations in this general f aunal 

 area, one off Bermuda, and the other off the West Indies, which may 

 probably belong here. So far as the material shows, this species 

 has not occurred in either the Caribbean or the Gulf of Mexico. 



It is a large, well-characterized species in its more or less com- 

 pressed form, somewhat alternating chambers, and thickened test. 



Polymorphina flintii — material examined. 



