76 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



deep reentrant, serrations less deep toward the apertural end ; wall 

 smooth, white, somewhat shining ; aperture subcircular, with a narrow 

 neck, although not produced, tooth strongly bifid, only partially 

 filling the opening. 



Diameter, up to 2 mm. 



Distribution. — Goes recorded this species from Albatross material 

 from the west coast of America in 1,000 to 1,200 fathoms. Flint also 

 recorded it from Albatross D2805 in 51 fathoms in Panama Bay. 

 I have had well-developed material from but two North Pacific sta- 

 tions, Tuscarora 47, latitude 26° 41' N.; longitude 142° 42' E. in 1,331 

 fathoms, and Albatross D4953 in 1,350 fathoms, off Japan. 



This species is evidently rare in the North Pacific. It is closely 

 allied to B. murrhyna, with the deep reentrant at the basal end and 

 in the narrow neck and nearly circular aperture. 



The original description of L. W. Bailey has evidently been over- 

 looked, as the paper was largely devoted to diatoms. An examina- 

 tion of the figure and description, however, are perfectly convincing 

 evidence that this is the same species as the one that Bailey had. 



An examination of the original notes and drawings of J. W. Bailey 

 shows that he had recognized but not published this species at a 

 much earlier date. 



BILOCULINA SARSII Schlumberger. 

 Plate 30, fig. 2. 



Biloculina ringens H. B. Brady (not B. ringens Lamarck), Rep. Voy. Challenger, 



Zoology, vol. 9, 1884, p. 142, pi. 2, fig. 7. 

 Biloculina sarsi Schlumberger, Mem. Soc. Zool. France, vol. 4, 1881, p. 166, 



pi. 9, figs. 55-59, text figs. 10-11. 



Description. — Test in front view nearly circular, the ends slightly 

 truncate, in end view ellipsoid, the periphery angled, somewhat pro- 

 duced, margin subcarinate; wall smooth; aperture very broad in 

 end view, with the tooth curved, concave in the middle, the ends 

 extended and the aperture curving in a circle about them, aperture 

 nearly two-fifths the width of the whole test. 



Diameter, about 1 to 1.3 mm. 



Distribution. — Specimens seemingly identical with this species were 

 obtained from three Nero stations 1254 in 264 fathoms, between 

 Guam and Japan, and 2037 and 2070 in 55 and 285 fathoms, respec- 

 tively, both off the Hawaiian Islands. It occurred at Tuscarora 

 station 47, in 1,499 fathoms, latitude 24° 20' N., longitude 54° 06' E., 

 and from Albatross H4882 in 248 fathoms in Colnett Strait, D4807 in 

 44 fathoms, D4874 in 66 fathoms, and D4922 in 60 fathoms, all off 

 Japan. 



