FORAMINIFERA OF NORTH PACIFIC OCEAN. 65 



from three Albatross stations, off the Hawaiian Islands; D4000 in 

 104-213 fathoms; H4566 in 572 fathoms; and H4696 in 367 fathoms. 



Fine large specimens occur off the Pacific coast of the United 

 States and in Bering Sea in comparatively shallow cold water. 

 Occasional specimens occur off Japan being common at one station, 

 Albatross D5056 in 258 fathoms, bottom temperature 46° F. It 

 also occurred off the Hawaiian Islands, Albatross H3007 in 323 

 fathoms. 



The main distinguishing character between this species and G. 

 rotulata is the presence of the broad keel in G. cultrata. The distribu- 

 tion, at least so far as is shown by the North Pacific material exam- 

 ined, is by no means coextensive in the two species. 



CRISTELLARIA RENIFORMIS d'Orbigny. 



Plate 30, fig. 4; plate 33, fig. 1. 



Cristellaria rcniformis d'Orbigny, Foram. Foss. Bass. Tert. Vienne, 1846, p. 88, 

 pi. 3, figs. 39, 40.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 539, pi. 70, figs. 3a, b — Flint, Rep. IT. S. Nat. Mus., 1897 (1899), p. 315, 

 pi. 62, fig. 2.— Bagg, Bull. 513, U. S. Geol. Survey, 1912, p. 66, pi. 19, 

 figs. 2a, b. 



Description. — Test compressed, somewhat elongated, early cham- 

 bers forming a close coiled test, later chambers becoming longer and 

 a tendency toward an elongate form is shown, with oblique sutures; 

 wall smooth; peripheral border slightly to strongly keeled; aperture 

 often slightly produced, radiate. 



Length up to 5 mm. 



Distribution. — Brady records this species from the North Pacific in 

 2,050 fathoms in the Challenger report, but in the volume on the 

 Summary of Results it is also recorded from Challenger station 237 in 

 1,875 fathoms. I have had material which seems to belong to this 

 species from three Albatross stations, D4310, D4972 in 440 fathoms, 

 bottom temperature 39.8° F., and D5078 in 514 fathoms, bottom 

 temperature 38.9° F., off Japan. It also occurred at Nero station 

 1302 in 1,331 fathoms, also off Japan. 



CRISTELLARIA ARTICULATA Reuss. 



Plate 31, fig. 1. 



Robulina articulata Reuss, Sitz. Akad. Wiss. Wien, vol. 48, 1863, p. 53, pi. 5, 



fig. 62. 

 Cristellaria articulata Reuss, Sitz. Akad. Wiss. Wien, vol. 62, 1870, p. 483. — von 



Schlicht, Foram. Pietzpuhl, 1870, pi. 17, figs. 5-12. — H. B. Brady, Rep. 



Voy. Challenger, Zoology, vol. 9, 1884, p. 547, pi. 69, figs. 10-12.— Flint, Rep. 



U. S. Nat. Mus., 1897 (1899), p. 317, pi. 64, fig. 2.— Bagg, Proc. U. S. Nat. 



Mus., vol. 34, 1908, p. 146. 



Description. — Test close coiled, nearly circular in side view, thick, 

 chambers tumid, sutures depressed; periphery obtusely angled; aper- 



