FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 75 



States, westward along the path of the Nero and along the line 

 between Guam and Japan. These stations range in depth from 665 

 to 2,391 fathoms, the majority of them being about 1,500 fathoms. 



BILOCULINA MURRHYNA Schwager. 



Plate 28, fig. 3; plate 29, fig. 1. 



Biloculina murrhyna Schwager, iVorara-Exped., Geol. Thiel., vol. 2, 1866, 

 p. 203, pi. 4, figs. 15 a-c. — Schlumberger, Mem. Soc. Zool. France, vol. 4, 

 1891, p. 165, pi. 9, figs. 52-54, text figs. 8, 9. 



Biloculina dcpressa d'Orbigny, var. murrhyana II. B. Brady, Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, 1884, p. 146, pi. 2, figs. 10, 11.— Bagg, Proc. U. S. 

 Nat. Mus., vol. 34, 1908, p. 117. 



Description. — Test in front view in young specimens nearly circular, 

 in adult specimens somewhat longer than broad, in end view ellipsoid 

 with the borders extended and carinate, the carina interrupted at the 

 point opposite the aperture, leaving a sinus, rather deep and often 

 with a long spine at each angle in young specimens; hi adults sinus 

 less deep and the spines usually reduced or wanting; aperture in the 

 young with a neck not exceeding the periphery of the test; in adults 

 with a prominently exserted tubular neck with a bifid tooth partially 

 filling the nearly circular opening; wall smooth. 



Diameter, usually about 1 to 1.5 mm. in adults. 



Distribution. — Brady records a single North Pacific station for this 

 species, Challenger 244 in 1,850 fathoms; Goes records it off the 

 western coast of America in 1,000-1,200 fathoms; and Bagg from two 

 Albatross stations off the Hawaiian Islands H4502 in 1,342 fathoms 

 and H4555 in 1,398 fathoms. I have notes of its occurrence at about 

 20 Nero stations from the Hawaiian Islands westward to Midway 

 Island, to Guam, and to Japan, most of the stations having depths of 

 more than a thousand fathoms. It has occurred at Albatross D2806 

 in 1,379 fathoms off the Galapagos Islands and D4957 hi 437 fathoms 

 off Japan, as well as at a few scattered stations dredged by the 

 Tuscarora. 



BILOCULINA SERRATA L. W. Bailey. 

 Plate 29, fig. 2. 



Biloculina serrata~L. W. Bailey, Boston Journ. Nat. Hist., vol. 7, 1862, p. 350, 

 pi. 8, fig. E. — Schlumberger, Feuille Jeun. Nat., vol. 13, 1883, p. 106, pi. 

 3, fig. 3; Mem. Soc. Zool. France, vol. 4, 1891, p. 163, pi. 9, figs. 50, 51, 

 text figs. 6, 7. 



Biloculina depressa d'Orbigny, var. serrata LI. B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 146, pi. 2, fig. 3.— Goes, Bull. Mus. Comp. Zool., 

 vol. 29, 1896, p. 87.— Flint, Ann. Rep. U. S. Nat. Mus., 1897 (1899), p. 294, 

 pi. 40, fig. 2. 



Description. — Test in front view nearly circular, central portion 

 tumid, toward the periphery compressed, forming a carina which is 

 deeply serrate, the middle of the margin opposite the aperture with a 



