FORAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 237 



end extending beyond the umbilicus and onto the previous whorl; 

 sutures with raised ribs ending in a knob near the umbilicus, remainder 

 of sm'face smooth; aperture radiate, apertural face concave. 



Diameter up to 3 mm. 



Distribution. — Type specimen (U.S.N.M. No. 9128) from Albatross 

 station D5467, in 480 fathoms (878 meters), east coast of Luzon. 

 The species also occurred at numerous stations, mostly in the China 

 Sea and in the Philippine Archipelago. The depth of these stations 

 ranges from 88 to 554 fathoms (161 to 1,012 meters), the average being 

 260 fathoms (476 meters). The average bottom temperature is 

 52.6° F. (11.4° C). 



This species differs from C. submamilligera mainly in its great 

 development of the alar projection on the inner border of the chamber. 



Cristellaria expansa — Material examined. 



CRISTELLARIA EXPANSA. var. PLANULATA Cushman. 



Plate 46, figs. 3a, b. 



Cristellaria expansa, var. planulata Cushman, Proc. U. S. Nat. Mus., vol. 51, 1917, 

 p. 658. 



Desaiption. — Variety differing from the typical m.ainly in the lack 

 of ornamentation characteristic of the type, and if at all ornamented 

 consisting of indistinct costae in the axis of growth; alar projections 

 more distinct than in the type, due to the lack of ornamentation to 

 hide the sutiu-es, usually more compressed than the type form. 



Distribution. — Type specimen (U.S.N.M. No. 9129) from Albatross 

 station D5220, in 50 fathoms (91 meters), between Marinduque and 

 Luzon. 



