NO. 4 CUSHMAN AND MCCULLOtH : SOME VIRGULININAE 187 



Bolivina advena Cushman, van striatella Cushman 

 Plate 21, Figs. 7-11 



Bolivina advena Cushman, var. striatella Cushman, Contr. Cushman 

 Lab. Foram. Res., vol. 1, pt. 2, 1925, p. 30, pi. 5, figs. Za, h; vol. 2, pt. 3, 

 1926, p. 54.— Cushman and Moyer, I. c, vol. 6, 1930, p. 58, pi. 8, fig. 6. 

 — Cushman, Stewart and Stewart, Trans. San Diego Soc. Nat. Hist., 

 vol. 6, 1930, p. 68. — Cushman and Laiming, Journ. Pal., vol. 5, 1931, 

 p. 110, pi. 12, fig. 5. — Cushman and Parker, Contr. Cushman Lab. 

 Foram. Res., vol. 7, 1931, p. 9. — Cushman, Special Publ. 9, Cushman 

 Lab. Foram. Res., 1937, p. 98, pi. 10, fig. 22; pi. 16, figs. 15-17.— Klein- 

 pell, Miocene Stratigraphy of California, 1938, p. 266, pi. 15, fig. 1. 



Variety differing from the typical in the longer, more tapering form, 

 the initial end subacute, about 9 chambers making up the last half of the 

 test; sutures somewhat distinct, very slightly depressed; wall finely per- 

 forate, surface of the early portion ornamented with very fine, numerous 

 longitudinal costae, the later portion smooth. 



This variety was described from the Miocene of California, but speci- 

 mens that are very similar have been recorded from dredgings off the Cali- 

 fornia coast. There is considerable variation in the development of the 

 costae and in the amount of compression of the test. 



Stations: 55, 81, 109, 110, 113, 114, 115, 138, 213, 217, 225, 226, 

 255, 256, 261, 264, 296, 321, 338, 422, 503, 526, 529, 558, 627, 629, 

 1011, 1015, 1017, 1063, 1068, 1076, 1099, 2087, 2090, 2092, 2093, 2100, 

 2106, 2107, 2109, 2110, 2113, 2116, 2129, 2132, 2133, 2136, 2137, 

 2140, 2153, 2154. 



Distribution. — These numerous records off California and Mexico 

 range from a depth of 14 to 123 fms. Additional records are off Costa 

 Rica, Ecuador, Kobe, Japan, and Singapore with a depth range from 

 10 to 19 fms. 



Bolivina aenariensis (Costa) (?) 

 Plate 21, Fig. 12 



There are a number of specimens similar to that here figured which 

 may be referred with some question to Costa's species. They are all very 

 similar and show little variation. 



Stations: 136,422,512,583. 



Distribution. — Station 136 is in shallow waters off San Pedro; Sta- 

 tion 422 is off Socorro Island, Mexico. The other two records are off 

 Colombia in 48 fms. and off Ecuador in 10 fms. 



