FOKAMINIFERA OF NORTH PACIFIC OCEAN. 67 



CRISTELLARIA NITIDA d'Orbigny. 



Plate 32, fig. 2. 



"Nautili Lituitati" Soldani, Testaceographia, vol. 1, pt. 1, 1789, p. 64, pi. 64, 



figs. O, P. 

 Cristellaria nitida d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 291, No. 5. — H. B. 



Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 549, pi. 70, figs. 2a, b. 



Description. — "A feeble modification belonging to the 'cassis' and 

 k mamiiXligera' group. The shell is compressed and carinate and the 

 earlier sutures limbate. It is a doubtful and unsatisfactory species." 



Length 1.4 mm. 



Distribution.- — The only record for this somewhat doubtful species 

 in the North Pacific is that given by Brady in the Challenger Report, 

 95 fathoms off the Philippines. 



The description and figure are taken from the Challenger Report. 



CRISTELLARIA ORBICULARIS (d'Orbigny). 

 Plate 36, figs. 4, 5. 



"Nuclei conico rotundati" Soldani, Testaceographia, vol. 2, 1798, App., p. 138, 



pi. 1, fig. 12. p, P. 

 Robulina orbicularis d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 288, pi. 15, 



figs. 8, 9. 

 Cristellaria orbicularis H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 549, pi. 69, fig. 17.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 317, pi. 



64, fig. 3.— [?] Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 148. 



Description. — Test very similar to C. vortex, but the periphery 

 extended into a distinct keel, varying in width. 



Length 1 to 1.5 mm. 



Distribution. — Bagg records this species from Albatross station 

 H4508 in 495 fathoms near the Hawaiian Islands as rare. I have ma- 

 terial from Albatross stations off Japan, D4807 in 44 fathoms; D4887 

 in 71 fathoms, bottom temperature 59.7° F.; D4891 in 181 fathoms, 

 bottom temperature 50.2° F.; and D4900 in 139 fathoms, bottom 

 temperature 52.9° F. It also occurred at Nero station 203 in 1,625 

 fathoms near the Midway Islands. 



This species seems to be very slightly different from C. vortex, 

 except in the character of the keel. The specimens figured by Flint 

 seem to me to be rather different in most cases from the typical form 

 figured by d'Orbigny. The sutures are much less oblique, the 

 chambers much shorter, and the whole seems unlike the type. 



