FORAMINIFERA OF NORTH PACIFIC OCEAN. 75 



fathoms, bottom temperature 52.9° F. This is another example of 

 the extension of the species recorded by Brady from the Philippines 

 to southern Japan at this particular station. 



CRISTELLARIA DENTICULIFERA, new species. 

 Plate 37, fig. 1. 



Cristellaria cultrata H. B. Brady (part) (not C. cultrata Montfort), Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 550, pi. 70, figs. 7, 8. 



Description. — Test close coiled, biconvex, sutures somewhat lim- 

 bate; wall of earlier chambers ornamented with longitudinal curved 

 costae often broken up into irregular tubercles; later chambers smooth 

 and unornamented; peripheral border keeled, but the outer edge 

 broken up into a series of tooth-like projections. 



Length up to 2.5 mm. 



Type-specimen. — Cat. No. 8547, U.S.N.M., from AThatross station 

 D4900 in 139 fathoms, bottom temperature 52.9° F. off Japan. 



This certainly seems to be a different species from typical C. cul- 

 trata. It differs in the limbate sutures, the smaller number of cham- 

 bers in the coil, the surface ornamentation, and the denticulate char- 

 acter of the peripheral keel. 



CRISTELLARIA GEMMATA H. B. Brady. 



Plate 34, fig. 7. 



Cristellaria gemmata H. B. Brady, Quart. Journ. Micr. Soc, vol. 21, 1881, p. 64, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 554, pi. 71, figs. 6, 7. 



Description. — " Test planospiral, broad, oblong, compressed or com- 

 planate; lateral faces only slightly convex, dorsal edge acute or 

 subcarinate ; segments broad and arcuate, two or three of later ones 

 free at both lateral margins; exterior ornamented with exogenous 

 beads, arranged either upon the sutural lines, or, less frequently, in 

 rows parallel to them." 



"Length l/20th inch (1.26 mm.)." 



Distribution. — The only North Pacific record for this species is 

 that given by Brady, a Challenger station off the Philippines in 95 

 fathoms. 



CRISTELLARIA COSTATA (Fichtel and Moll). 

 Plate 34, fig. 4. 



Nautilus costatus Fichtel and Moll, Test. Micr., 1803, p. 47, pi. 4, figs. gA. 

 Spincterules costatus Montfort, Conch. Syst., 1808, p. 222, genre 56 e . 

 Lenticulina costata De France, Diet. Sci. Nat., vol. 32, 1824, p. 182. 

 Robulina costata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 289, No. 13 [?]. 

 Cristellaria costata Parker and Jones, Ann. Mag. Nat. Hist., ser. 3, vol. 5, 1860, 



p. 113, No. 19.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 555, pi. 71, figs. 8, 9. 



Description. — Test close coiled, chambers comparatively few to 

 each volution, sutures limbate; surface ornamented by numerous 



