FORAMINIFEKA OF NORTH PACIFIC OCEAN. 



35 



evenly rounded, the chambers numerous, high at the posterior outer 

 edge each projecting backward in a spinose projection; wall smooth, 

 punctate; aperture elongate; color white. 

 Length slightly less than 1 mm. 

 Distribution. — The only records in the North Pacific 

 for this species are the two CTiallenger stations from 

 which it was recorded by Brady, off the Philippines, 

 in 95 fathoms, and on the Hyalonemar-ground south 

 of Japan, in 3-15 fathoms. 



The figures of this species are very different, that 

 of Hantken showing little it any of the posterior 

 projections, and Egger's figure being very different 

 from the usual form assigned to this species. From 

 a study of the published figures and descriptions it 

 seems very possible that our recent species may be 

 found upon careful study to be different from the fossil. 



Fig. 5(3.— Bolivina 

 beyrichi. x 50 

 (after Brady). 



BOLIVINA BEYRICHI Reuss, var. ALATA (Seguenza). 



Vulvulina alata Seguenza, Alii Accad. Gioenia Sci. Nat., eer. '_', vol. 18, L862, 



p. 115, pi. 2, figs. 5, 5a. 

 Bolivina alata Egger, Abh. kon. bay. Akad. Wiss. Munchen, CI. n. vol. 18, 1893, 



p. 296, pi. 8, fig. 27. 

 Bolivina beyrichi, var. alata H. 13. Brady, Rep. Voy. 



Challenger, Zoology, vol. 9, 1884, p. 422, pi. 53, 



figs. 2-4. 

 Bolivina beyrichi, var. carinata Hantken, Magy. kir. 



foldt. int. evkonyve, vol. 4, 1S75 (187G), pi. 7, 



fig. 12; Mitth. Jahrb. Ung. geol. Anstalt, vol. 4, 



1875 (1881), pi. 7, fig. 12. 



Description. — Test differing from that of the 

 typical form of the species by the wide periph- 

 eral flange; it is also broader and much more 

 tapering. 



Length about 1 mm. 



Distribution. — Brady ree< >rds this variety from 

 one North Pacific Cltal- 

 lenger station off the Philip- ^^"Sfil^. 



pines, in 95 fathoms. There 

 is a specimen (figured) in 

 the material which I have 

 examined from Albatross 

 station H4025, in 536 fath- 

 oms, near the Aleutian Islands, which seems to belong here and is 

 not unlike the specimen figured by Brady in pi. 53, tig. 2, of the 

 Challenger report. 



Fig. 



57.— Bolivina beyrichi, yah. ai.ata. X 00. a, 



AI'ERTURAL VIEW; 6. FRONT VIEW. 



