186 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



Stations: A-2, A-15, 55, 60, 79, 80, 144, 468, 508, 516, 1006, 1009, 

 1015, 1068, 1095, 1096, 1097, 1100, 1101, 2000, 2093, 2107, 2113, 2116, 

 2134, 2140, 2149. 



Type locality. — Ensenada de Los Muertos, Gulf of California, Mex- 

 ico, in 10 fnis. 



Distribution. — The above records range from Wrangell, Alaska, in 

 2 fms. ; the Gulf of California in 56 to 125 fms. ; to Galapagos in 20 fms. 

 and to Colombia in 55 fms. 



Bolivina advena Cushman 

 Plate 21, Figs. 4-6 



Bolivina advena Cushman, Contr. Cushman Lab. Foram. Res., vol. 1, 

 pt. 2, 1925, p. 29, pi. 5, figs. U, b; vol. 2, pt. 3, 1926, p. 54.— Cushman, 

 Stewart and Stewart, Trans. San Diego Soc. Nat, Hist., vol. 6, 1930, 

 p. 67. — Cushman and Ponton, Bull. 9, Florida State Geol. Survey, 1932, 

 p. 83, pi. 12, fig. 3. — Cushman, Special Publ. 9, Cushman Lab. Foram. 

 Res., 1937, p. 95, pi. 10, fig. 16. — Cushman and McGlamery, Prof. Paper 

 189D, U.S. Geol. Sui-vey, 1938, p. 107, pi. 25, fig. 12.— Kleinpell, Mio- 

 cene Stratigraphy of California, 1938, p. 264, pi. 7, fig. 6; pi. 9, fig. 7( ?). 



Test elongate, 21/^ to 3 times as long as broad, somewhat fusiform, 

 greatest breadth toward the apertural end, periphery of the early portion 

 acute, becoming rounded in the later portion, early portion strongly com- 

 pressed, later portion somewhat more thickened ; chambers distinct, those 

 of the early portion very low and broad, later increasing in relative height 

 as added, so that toward the apertural end the last-formed chamber may 

 be nearly as high as broad, slightly inflated, particularly in the later por- 

 tion; sutures slightly limbate, particularly in the early portion, later 

 somewhat depressed, somewhat curved, in the early portion forming an 

 angle of about 30° with the horizontal; wall smooth, but distinctly per- 

 forate; aperture narrow, elongate, opening on the base of the inner mar- 

 gin of the last-formed chamber. Length 0.45-0.50 mm. ; breadth 0.20-0.22 

 mm.; thickness 0.10-0.12 mm. 



The records for this species are all from the Miocene. Rare specimens 

 occurred at stations 469, 1015, and 1069, but they may possibly be re- 

 worked fossils. 



Distribution. — Station 1015 is off Tyler Bay, Santa Cruz Island, in 

 32 fms.; Station 1069 is off Santa Rosa Island in 230 fms.; Station 469 

 is off Charles Island, Galapagos, in 10 fms. These bottom samples gave 

 no evidence of reworked fossils. 



