FOKAMINIFERA OF THE PHILIPPINE AND ADJACENT SEAS. 243 



Cristellaria costata, var. sublaevis — Material examined. 



CRISTELLARIA BRADYI Cushman. 



Plate 48, figs, la, b. 

 Cristellaria costata H. B. Brady (in part?), Rep. Voy. Clialletigei-, Zoology, vol. 9, 



1884, p. 555, pi. 71, fig. 8. 

 Cristellaria bradyi Cushman, Proc. U. S. Nat. Mus., vol. 51, 1917, p. 659. 



Description. — Test ovate, thick, last few chambers more or less 

 elongated ; sutures hidden by the surface ornamentation, which con- 

 sists of longitudinal rounded costae, more or less broken, especially 

 toward the umbilical area, and becoming less distinct or entirely dis- 

 appearing on the last-formed chambers; peripheral margin rounded; 

 aperture radiate. 



Length up to 3 mm. 



Distrihn.fion. — Type specimen (U.S.N.M. No. 9133) from Albatross 

 station D5313, in 150 fathoms (270 meters), China Sea off Hongkong, 

 bottom temperature 53.6° F. (12.0° C). Besides, it has occurred at 

 various other stations in the China Sea, off Hongkong and off For- 

 mosa; off Jolo; Linapacan Strait; Palawan Passage; and between Jolo 

 and Tawi Tawi. 



These stations range in depth from 43 to 340 fathoms (78 to 622 

 meters), the average depth being 167 fathoms (305 meters). The 

 bottom temperatures where given average 53.5° F. (11.8° C). 



This species differs from typical 0. costata in that the longitudinal 

 costae are the dominant ornamentation, running parallel with the 

 axis of growth and are continuous over the whole test, while those of 

 C. costata, are limited to definite series, each set limited to a single 

 chamber and independent of those of adjacent chambers. 



Cristellaria bradyi — Material examined. 



