FORAMINIFERA OF NORTH PACIFIC OCEAN. 105 



of the uniserial portion well rounded, shorter than broad, sutures 

 only slightly constricted ; aperture large, terminal, with a very short 

 tubular neck and broad flaring lip; wall smooth. 



Length about 1 mm. 



Distribution. — The only published North Pacific records are those 

 given by Bagg. These are seven Albatross stations in the vicinity of 

 the Hawaiian Islands, 104 to 1,544 fathoms. I have found the species 

 fairly common in the region from near the Hawaiian Islands, Alba- 

 tross H2922 in 268 fathoms, Nero 2071 in 271 fathoms, and off the 

 coast of Japan, D4968 in 253 fathoms. It has occurred also in the 

 Nero material from numerous stations on the line of soundings 

 between Yokohama and Guam in 1,208 to 1,660 fathoms. This 

 species has been found at three Tuscarora stations, 57 and 58, in 814 

 and 1,331 fathoms near the Bonin Islands and at station 15 in 1,874 

 fathoms south of the Midway Islands. The bottom temperatures 

 where recorded are 44.8° and 45.7° F. off Japan and the Hawaiian 

 Islands, but at the deeper Nero soundings go down to 35° F. 



SIPHOGENERINA BIFRONS (H. B. Brady). 

 Plate 45, figs. 1, 2, 5-7. 



Sagrina bifrons H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 64; Rep. 

 Voy. Challenger, Zoology, vol. 9, 1884, p. 582, pi. 75, figs. 18-20.— Egger, 

 Abh. kon. bay. Akad. Wigs. Munchen, CI. n, vol. 21, 1899, p. 134, pi. 15, 

 figs. 25, 26. — Millett, Journ. Roy. Micr. Soc, 1903, p. 270. — Chapman, Journ. 

 Linn. Soc, Zoology, vol. 30, 1910, p. 415. 



Siphogenerina (Sagrina) bifrons Egger, Abh. kon. bay. Akad. Wiss. Munchen, 

 CI. n, vol. 18, 1893, p. 317, pi. 9, figs, 25, 26, 29. 



Description. — Test elongate, compressed, straight or very slightly 

 curved, in end view elliptical, median portions of the broad faces 

 somewhat concave, megalospheric form with the apical end broadly 

 rounded and of about the same diameter as the rest of the test, 

 microspheric form with the apical end much more attenuate, growing 

 rapidly broader, then contracted where the uniserial portion begins; 

 sutures hardly depressed, distinct, often of clear material, appearing 

 darker than the rest of the test; aperture rounded, without a distinct 

 neck but with a slight rounded lip; microspheric form usually the 

 larger. 



Length 0.75 to 1 mm. 



Distribution. — Brady described this species from material dredged 

 in 345 fathoms on the Hyalonema-ground off southeastern Japan. 

 This is the only locality noted in the Challenger Report. It has been 

 recorded by Egger off west Australia, by Millett from the Malay 

 Archipelago, and by Chapman from about Funafuti. Apparently the 

 species belongs to a warm-water fauna reaching its northern limit off 

 Japan. Egger's material was from 560 fathoms, Millett's material 

 from shallow water, while Chapman's specimens were from 2,400 



