FORAMINIFERA OF THE ATLANTIC OCEAN. 



47 



by Heron- Allen and Earland from off the coast of England may be 

 this species, but their figured specimen at least from the Clare Island 

 region is not at all like this. The species is replaced south of Cape 

 Hatteras and in the Gulf of Mexico by the following variety. 



Bolivina subaenariensis — material examined. 



BOLIVINA SUBAENARIENSIS, new species, var. MEXICANA. new rarlety. 



Plate 8, fig. 1. 



Bolivina aenariensis Flint (part) (not Costa), Rep. U. S. Nat. Mus., 1897 (1899), 

 p. 292. 



Description. — Variety differing from the typical in the greater 

 number of costae which for the most part run nearly to the apertural 

 end of the test; by the sharper, more abruptly tapering form, 

 especially toward the apex of the test, and by the translucent char- 

 acter of the wall. 



Distrihution. — Type-specimen (U.S.N.M. No. 17129) from Alha- 

 iross station D2377 in 200 fathoms (366 meters), in the northern part 

 of the Gulf of Mexico. Specimens from a number of other stations 

 in this area are very similar in their characters. 



Bolivina subaenariensis, var. rnexicana — material examined. 



