204 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 6 



Cushman Lab. Foram. Res., vol. 6, 1930, p. 58, pi. 8, fig. 5. — Cushman, 

 Special Publ. 9, Cushman Lab. Foram. Res., 1937, p. 139, pi. 19, figs. 

 4, 5. 



Bolivina beyrichi Reuss, var. alata Cushman (not Seguenza), Bull. 

 71, U.S. Nat. Mus., pt. 2, 1911, p. 35, text figs. 51 a, b. 



Test short, l^^ to 2 times as long as broad, strongly compressed, rap- 

 idly increasing in breadth, greatest at the last 2 chambers, periphery 

 keeled except about the first few chambers, not spinose at the initial end ; 

 chambers distinct, somewhat inflated, increasing rapidly in size and rela- 

 tive height as added, usually without strongly pointed peripheral angles; 

 sutures distinct, depressed, strongly oblique in the early stages, less 

 strongly so later, not limbate; wall distinctly and coarsely perforate, 

 otherwise smooth; aperture elongate, elliptical or oval, with raised lip. 

 Length 0.50-0.60 mm.; breadth 0.30-0.35 mm.; thickness 0.10-0.12 mm. 



This species is apparently confined to the eastern Pacific in rather 

 cold water at depths of 55 to 500 fms. 



Stations: 56, 57,69,516. 



Distribution. — From Los Frailes Point, Mexico, in 160 fms.; in the 

 Gulf of California in 150 fms.; and off Colombia in 55 fms. 



Bolivina pseudoplicata Heron-Allen and Earland ( ?) 

 Plate 25, Figs. 4-7 



There are numerous specimens in the collection which seem related to 

 B. subexcavata Cushman and Wickenden but which develop, as our fig- 

 ures show, a distinct reticulation, particularly on the basal portion. These 

 show a wide range of variation, but the Atlantic forms show fully as 

 wide a range, and it may be that they are the same. 



Stations: C-13, 76, 106, 109, 110, 136, 144, 227, 503, 1004, 1006, 

 1009, 1010, 1011, 1014, 1017, 1042, 1062, 1099, 2135, 2139, 2153. 



Distribution. — Numerous records ofif the Channel Islands with a 

 depth range of 4 to 63 fms. ; four records off Mexico and in the Gulf of 

 California in 2 to 58 fms.; near La Libertad, Ecuador, in 19 fms. 



Bolivina pygmaea H. B. Brady 

 Plate 25, Figs. 8-12 



Bolivina pygmaea H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 

 1881, p. 27; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 421, pi. 53, 

 figs. 5, 6. — Jones and Chapman, Monograph of Christmas Island, 1900, 



