FOEAMINIFERA OF THE ATLANTIC OCEAN. 



103 



periphery carinate or angled, apertural face of the last-formed 

 chamber squarely truncate or even slightly concave, the sides angled, 

 the apertural end projecting; sutures fairly distinct, in the later 

 chambers slightly depressed, nearly straight, generally radiate; aper- 

 ture radiate, at the end of the peripheral projection of the last- 

 formed chamber. 



Length up to 2.50 mm. 



Distribution. — Type-specimen (U.S.N.M. Cat. No. 18785) from 

 Albatross station D2041, in 1608 fathoms (2940 meters), off the 

 northeastern coast of the United States. This species is common, 

 often abundant, at Albatross stations south of latitude 40° N., off 

 the northeastern coast of the United States, with a few stations south 

 of Cape Hatteras, off the coasts of Carolina and Georgia. Several of 

 the stations from which Flint records Cristellaria rcniformis are in 

 this same general area. The species is very different from C. reni- 

 formis as described by D'Orbigny, and seems to be one of the more 

 characteristic and abundant species off the eastern coast of the United 

 States. 



Cristellaria occidentalis — material examined. 



CRISTELLARIA OCCIDENTALIS, new species, var. GLABRATA, new variety. 



Plate 25, fig. 3. 



Description. — Variety differing from the typical in the more cir- 

 cular form, very smoothly finished surface, the sutures being distinct 

 but not disturbing the very even polished character of the surface, 

 about 10 chambers in the last-formed coil, the periphery angled, very 

 slightly carinate. 



Diameter up to 3 mm. 



Distribution. — Type-specimen (U.S.N.M. Cat. No. 18823) from 

 Albatross station D2541, in 134 fathoms (245 meters), off the north- 

 56148—23 8 



