FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 25 



Distribution. — This species is recorded by Brady in the Challenger 

 Report at four stations 214 in 500 fathoms, 224 in 1,850 fathoms, 241 

 in 2,300 fathoms, and 253 in 3,125 fathoms. Goes records it from 

 two Albatross stations in the western Pacific, D 3431 in 995 fathoms 

 and D 3375 in 1,201 fathoms, one specimen at each station. Bagg 

 records it from two Albatross stations, H 4508 in 495 fathoms and 

 II 4555 in 1,398 fathoms off the Hawaiian Islands. 



In the material I have examined this has proved to be the most 

 common species of the genus. It has occurred at Albatross stations 

 D3603 in 1,771 fathoms in Bering Sea, H 4878 in 84 fathoms and 

 D 4970 in 500 fathoms, bottom temperature 39.1° F., both off Japan. 

 It was taken at Alert station 1169 in 2,113 fathoms, lat. 21° 00' 30" 

 N.; long. 142° 34' 00" E. Near Guam it was found at two Nero 

 stations 990 in 859 fathoms and 1464 in 891 fathoms. Between 

 Yokohama and Guam it occurred at a large number of stations rang- 

 ing in depth from 901 to 2,250 fathoms. 



This is the commonest umbilicate species as far as the North Pacific 

 records show. It may be distinguished from the following species 

 most easily in face view, which in this species is narrow and in N. 

 pompilioides is broad. 



NONIONINA POMPILIOIDES (Fichtel and Moll). 



Plate 17, fig. 2. 



"Nautilus Melo" Soldani, Testaceographia, vol. 2, 1798, p. 38, pi. 8, figs. ZZ. 



A, B, C. 

 Nautilus pompilioides Fichtel and Moll, Test. Micr., 1803, p. 31, pi. 2, figs, a-e, 

 Nonionina pompilioides Parker, Jones, and H. B. Brady, Ann. Mag. Nat. Hist., 

 ser. 3, vol. 16, 1865, p. 18, pi. 3, fig. 98; ser. 4, vol. 8, 1871, p. 246, pi. 12, fig. 

 158.— Terrigi, Atti Accad. Pont. Nuovi Lincei, vol. 35, 1883, p. 204, pi. 4, 

 fig. 49.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 727, 

 pi. 109, figs. 10, 11. — Egger, Abh. kon. bay. Akad. Wiss. Munchen, CI. n, 

 vol. 18, 1893, p. 426, pi. 19, figs. 32, 33'.— Chapman, Proc. California Acad. 

 Sci., ser. 3 (Geol.), vol. 1, 1900, p. 256, pi. 30, fig. 16.— Millett, Journ. Roy. 

 Micr. Soc, 1904, p. 601.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 164. 



Description. — Test composed of numerous chambers, slightly um- 

 bilicate, last volution of about seven chambers, in face view slightly 

 tapering, broadest at the latest formed portion of the coil, slightly 

 longer than broad, the periphery very broadly rounded; surface 

 prominently pitted, sutures slightly limbate; aperture a narrow, 

 curved opening at the base of the apertural face of the chamber 

 forming nearly a semicircle, with a definite lip tliickening. 



Diameter, 0.50-0.80 mm. 



Distribution. — Brady records this species from two Challenger sta- 

 tions in the North Pacific in 1,850 and 2,250 fathoms. Bagg records 

 it from Albatross station H 4567 in 1,307 fathoms off the Hawaiian 

 Islands. I have had specimens from Holothurian stomachs taken at 



