30 



BULLETIN 161, UNITED STATES NATIONAL MUSEUM 



end subacute, apertural end broadly rounded, periphery acute but 

 not keeled, the early chambers often with short backward-pointing 

 spines; chambers distinct, about as high as broad but much over- 

 lapping so that the visible portion of the chamber in the early stages 

 is apparently 2 or 3 times as broad as high; sutures distinct, but only 

 slightly depressed, only slightly oblique; wall nearly transparent 

 except toward the base of the chamber where it becomes opaque due 

 to the large close-set perforations; apertm"e elongate, comma-shaped. 

 Length, 0.25 mm.; thickness, 0.10 mm. 



The types are from Albatross station H3989, South Pass, Likieb, 

 K mile north, in 468 fathoms, at 42.6° F., crs. co. s. 



This is a very distmctive species, occurring in small numbers but 

 at numerous Albatross stations, as will be seen m table 14. Its dis- 

 tribution is comparatively limited as the position of these stations 

 shows them all to be in the general region of the Marshall Islands. 

 The only shallow-water station at which the species occurred is that 

 of Rongelap Atoll, Marshall Islands. 



Table 14. — Bolivina -pseudopygmaea — material examined 



BOUVINA STRIATULA Cushman 



Plate 9, Figure 1 



Bolivina slriatula Cushman, Carnegie Inst. Washington Publ. 311, p. 27, pi. 3, 

 fig. 10, 1922; U. S. Nat. Mus. Bull. 104, pt. 3, p. 43, 1922.— Cushman and 

 Parker, Proc. U. S. Nat. Mus., vol. 80, art. 3, p. 16, pi. 3, figs. 21o, h, 1931.— 

 Cole, Florida State Geol. Survey Bull. 6, p. 41, pi. 2, fig. 9, 1931.— Cushman, 

 Cushman Lab. Foram. Res. Special Publ. No. 9, p. 154, pi. 18, figs. 30, 31, 

 1937. 



Test elongate, about 3 times as long as broad, much compressed, 

 microspheric form tapering throughout, megalospheric form often 

 with the adult portion of the test with the sides nearly parallel, 

 periphery rounded; chambers numerous, distinct, very slightly in- 

 flated, earlier ones much broader than high, relative height increasing 



