FORAMINIFERA OF THE ATLANTIC OCEAN. 



45 



for a short distance; wall hyaline, distinctly perforate; aperture 

 at one side near the distal end of the chamber, sometimes obli- 

 quely elongate, but somewhat variable. 



Length up t» 1.2 mm., megalospheric proloculum 0.076-0.115 mm., 

 microspheric proloculum 0.012-0.023 mm. 



Distribution. — Most of the records for this species are from the 

 Pacific, where it is very characteristic of considerable depths in 

 tropical and subtropical waters. In the Atlantic it is recorded by 

 Brady from the Challenger stations off the Canaries, off the Cape 

 Verde Islands, and southeast of Pernambuco, Brazil. Flint re- 

 corded this species from Albatross station D2144 in 896 fathoms 

 (1,639 meters), near Aspinwall, Isthmus of Panama. I have found 

 this species fairly common at this same station in the material I 

 have examined, but it has not occurred elsewhere in the western 

 Atlantic material. These specimens are all without the basal spine 

 which is so characteristic of most Pacific specimens that I have 

 seen. Wright has recorded this species from off the southwest 

 coast of Ireland, but it has not been recorded in this region by other 

 workers. From its general character of the test and the aperture, 

 it seems as though this species should belong to Bolivina rather 



than to Textularia. 



Bolivina quadrilatera — material examined. 



BOLIVINA COMPACTA Sidebottom. 



Bolivina robusta H. B. Brady, var. compacta Sidebottom, Mem. Proc. Manchester 

 Lit. Philos. Soc, vol. 49, No. 5, 1905, p. 15, pi. 3, fig. 7. 



Bolivina compacta Cushman, Bull. 71, U. S. Nat. Mus., pt. 2, 1911, p. 36, fig. 58 

 (in text); Publ. 311, Carnegie Inst. Wash., 1922, p. 26, pi. 1, fig. 10. 



Description. — Test elongate, tapering, periphery rounded, initial 

 end bluntly pointed, apertural end obliquely rounded; chambers 

 numerous, somewhat inflated; sutures very slightly depressed, not 

 very distinct; wall ornamented by a series of large coarse punctae, 

 somewhat irregularly arranged, those of the last-formed chambers 

 finer and more numerous; aperture elongate, extending from the base 

 of the inner margin of the last-formed chamber to the highest point 

 of the chamber; color white. 



Length of the Tortugas specimens 0.5 mm. 



Distribution. — Specimens of this species are extremely rare, a single 

 typical specimen occurring at station 20 in 7 fathoms and another 

 less typical specimen from station 22 in 6 fathoms, in the Tortugas 



