FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 37 



Genus PLANISPIRINA Seguenza, 1880. 



Planispirina Seguenza, Atti R. Accad. Lincei, ser. 3, vol. 6, 1880, p. 310 (Type 

 P. communis Seguenza). — H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 193 (part). 



Description. — Test planospiral, chambers in the later growth often 

 more or less involute, concealing the early development, which con- 

 sists of an oval proloculum, followed by the typical Cornuspira-like 

 second chamber, in turn followed by several chambers gradually 

 becoming shorter, those of the adult being less than a half coil in 

 length, usually three or four necessary to make a complete coil. 



PLANISPIRINA SPHAERA (d'Orbigny). 

 Plate 19, fig. 1. 



Biloeulina sphaera d'Orbigny, Voy. Amer. Merid., 1839, " Foraminiferee, " p. 66, 

 pi. 8, figs. 13-16.— H. B. Brady, Trans. Linn. Soc. London, vol. 24, 1864, 

 p. 466, pi. 48, figs, la-b.; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 141, 

 pi. 2, figs. 4a, 6. — Schlumberger, Feuille des Jeunes Naturalistes, vol. 13, 

 pi. 2, fig. 3.— Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 84. 



Planispirina sphaera Schlumberger, Mem. Soc. Zool. France, 1891, p. 190, 

 text figs. 45, 46. 



Description. — Test globular, smooth, two chambers only visible in 

 the adult, the last formed chamber making up nearly all the visible 

 portion of the test, the penultimate chamber represented in the adult 

 by a small protuberant circular area not covered by the last formed 

 chamber; chambers arranged planospirally, three chambers necessary 

 to complete a coil; aperture in the younger specimens V-shaped, in 

 older ones becoming a complex series of irregular narrow openings 

 not raised or but slightly above the general surface of the test. 



Diameter, up to 4 mm. 



Distribution. — Goes records this species from the Albatross material 

 off the western coast of America at depths of 700 and 1,300 fathoms, 

 stations not given. Material in the Goes collection from Albatross 

 D3400 in 1,322 fathoms labeled this species by Goes proves upon 

 examination to be rather Biloeulina globulus Bornemann. In the 

 same collection, however, there is a series of Atlantic specimens 

 which are P. sphaera (d'Orbigny). I have had material from Nero 

 station 2070 in 258 fathoms off the Hawaiian Islands and Albatross 

 D5056 in 258 fathoms, Suruga Gulf, Japan. These latter were very 

 large. 



Genus VERTEBRALINA d'Orbigny, 1826. 



Vertebralina d'Orbigny (Type Vcrtebralina striata d'Orbigny), Ann. Sci. Nat., 

 vol. 7, 1826, p. 283.— H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 186. 



Description. — Test with the early chambers planospiral, at least 

 from external appearances, later ones becoming rectilinear; wall 



