rORAMINIl-'EEA OF THE PHILIPPINE AND ADJACENT SEAS. 235 

 Cnstellaria papillosa — Material examined. 



CRISTELLARIA ACULEATA d'Orbigny. 



Cnstellaria aculeata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 292, No. 14. — H. 

 B. Brady, Rep. Voy. Challenger, Zoology, vol. 9. 1884, p. 555, pi. 71, figs. 4, 5. 



There are two specimens which are very close to the figures of 

 this species as given by Brady. They occiu' as single specimens at 

 two stations in water of medium depth. Brady's material dredged 

 by the Challenger was from the West Indian region, but these speci- 

 mens seem to be identical. They are not C. gemmata, which is 

 much more common in the same region and which seems to be 

 limited to the Indo-Pacific. 



Cristellaria aculeata — Material examined. 



CRISTELLARIA SUBMAMILLIGERA Cushman. 



Cristellaria mamilligera H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1834, p. 553, pi. 70, figs. 17, 18 (not C. mamilligei-a Karrer). — Cushman, Bull. 

 71, U. S. Nat. Mu3., pt. 3, 1913, p. 74, pi. 34, fig. 6a (not 6b wliich should read 

 5b). 



Cristellaria submamilligera Cushman, Proc. U. S. Nat. Mus., vol. 51, 1917, p. 657. 



Descnption. — Test biconvex, close-coiled, periphery with a thin 

 keel; sutures curved, limbate externally, ornamented by a raised 

 ridge which ends near the umbilical region in a protuberant knob, 

 often a distinct raised boss over the center of the umbilical region; 

 keel entire and not denticulate in well-preserved specimens; wall 

 between the raised ridges, smooth; aperture radiate. 



Diameter up to 3 m-m., usually less. 



Distribution. — Type specimen (U.S.N.M. No. 9127) from Albor- 

 tross station D53S8, in 226 fathoms (414 meters), between 

 Burins and Luzon, bottom temperature 51.4° F. (10.8° C), where 



