FORAMINIFERA OF NORTH PACIFIC OCEAN. 45 



aperture irregular in shape, elongate, situated in an oval depression 

 at the smaller end of the test; color white. 



Largest specimens 5 mm. in length; 3 mm. in diameter. 



Distribution. — A number of specimens of this species were obtained 

 by the fisheries steamer Albatross on the 1906 cruise in the North- 

 west Pacific. They are from station D5056, in 258 fathoms, in 

 Suruga Gulf, Japan. 



Type-specimen. — Cat. No. 8257, U.S.N.M., from the above station. 



This species differs from Pilulina jeffreysii Carpenter in its gen- 

 eral form, in its very thin walls, and in the character of its aperture. 

 It may belong to a new genus as it differs in characters of rather more 

 than specific importance. Pilulina jeffreysii is only known from the 

 North Atlantic and this species is widely separated geographically 

 as well as by distinctive characters. 



Genus PELOSINA H. B. Brady, 1879. 



Pelosina H. B. Brady (type, /'. variabilis H. B. Brady), Quart. Journ. Micr.Sci., 

 vol. 19, 1879, p. 30. — Butschli, in Bronns Klassen und Ordnungen des Thicr- 

 reichs, vol. 1, 1880, p. 191. — H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 235.— Rhumbler, Arch. Protistk., vol. 3, 1903, p. 238. 



Description. — Test free, variously formed, rounded, cylindrical or 

 irregularly elongate; wall usually thick, composed of mud with a 

 chitinous basal layer, exterior often with various foreign bodies in- 

 cluded in the test; aperture typically single and terminal. 



Three species of Pelosina are known from the North Pacific, but all 

 of them seem to be rare, and for the most part they occur in deep 

 water. 



PELOSINA ROTUNDATA H. B. Brady. 



Pelosina rotundata H. B. Brady, Quart. Journ. Micr. Sci., vol. 19, 1879, p. 31, 

 pi. 3, figs. 4, 5; Rep. Voy. Challenger, Zoology, vol.9, 1884, p. 236, pi. 25, figs. 

 18-20.— Egger, Abb.. k6n. bay. Akad. Wiss. Munchen, vol. 18, 1893, p. 254, 

 pi. 11, fig. 60.— Millett, Journ. Roy. Micr. Soc, 1899, p. 249, pi. 1, fig. 1.— 

 Rhumbler, Arch. Protistk., vol. 3, 1903, p. 239, fig. 71 (in text). 



Description.— Test flask-shaped or pyriform with an elongated 

 tubular neck, at the end of which is the aperture ; wall thick, composed 

 of mud and the tests of other Foraminifera, Globigernia, etc., with 

 little cement, the tubular neck membranaceous, interior consisting of 

 a single undivided chamber, small; color grayish white. 



Diameter 1.8 mm. 



Distribution. — The Challenger dredged this species at station 246, 

 in 2,050 fathoms in the middle of the North Pacific. This is the only 

 record for this area, although it was found by Millett in material from 



