212 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



the apertural end; sutures distinct, often strongly limbate, strongly 

 oblique, forming an angle of nearly 45° with the horizontal; wall coarse- 

 ly perforate, the earliest portion, especially in the megalospheric form, 

 with a few prominent costae; aperture narrow, elongate, the inner end 

 slightly expanded. Length up to 0.75 mm.; breadth 0.25-0.30 mm.; 

 thickness 0.08-0.10 mm. 



The types are from the Pliocene of Timms Point, San Pedro, Cali- 

 fornia. It is common in the Pliocene and Pleistocene of southern Cali- 

 fornia, and occurs in the Pliocene, Humboldt County, California. It oc- 

 curs off the coast of California at various depths. 



The species is somewhat variable, on one hand tending toward the 

 roughened, thick-walled condition of B. subadvena Cushman, and on the 

 other hand tending to become smooth, and related to B. argentea Cush- 

 man. 



This has proved to be a rare species in our material except at one 

 station, 82, off Long Point, Catalina Island, in 147 fathoms, where it was 

 abundant. 



Stations: 80, 82, 227, 634, 1070, 1077, 1079, 1080, 1083. 



Distribution. — ^Additional records for this species place it ofl the 

 Channel Islands in 127 to 300 fms. ; near Guadalupe Island, Mexico, in 

 200 fms. At Port Said the bottom sample came from the anchor. 



Bolivina striatula Cushman 

 Plate 26, Figs. 12, 13 



Bolivina striatula Cushman, Publ. 311, Carnegie Instit. Washington, 

 1922, p. 27, pi. 3, fig. 10; Bull. 104, U.S. Nat. Mus., pt. 3, 1922, p. 43. 

 — Cushman and Parker, Proc. U.S. Nat. Mus., vol. 80, art. 3, 1931, 

 p. 16, pi. 3, figs. 2\a, b. — Cole, Bull. 6, Florida State Geol. Survey, 1931, 

 p. 41, pi. 2, fig. 9. — Cushman, Special Publ. 9, Cushman Lab. Foram. 

 Res., 1937, p. 154, pi. 18, figs. 30, 31. — Asano, Journ. Geol. Soc. Japan, 

 vol. 45, 1938, p. 604, pi. 16 (5), fig. 18. — Cushman, Smithsonian Misc. 

 Coll., vol. 99, no. 9, 1941, p. 10. 



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

 crospheric 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 inflated, earlier ones much 

 broader than high, relative height increasing toward the apertural end, 

 where height and breadth are often about equal ; sutures distinct, slightly 

 limbate, obliquely curved, forming an angle of about 30-40° with the 



