NO. 4 CUSHMAN AND MCCULLOCH : SOME VIRGULININAE 201 



The type is from the Miocene, 1,100 feet N. and 200 feet W. of S.E. 

 corner of Sec. 7, T. 26 S., R. 10 E., Adelaida Quadrangle, California. 



The living specimens show a considerable range of variation as will 

 be seen from our figures. Some of the specimens are very close indeed to 

 the fossils as a comparison with the types shows. From these there is a 

 tendency for the chambers to be lower and more in the test as a whole. 

 The spinosity of the margin also is variable. 



Stations: 200, 509, 1049, 1080, 1082. 



Distribution. — Off Santa Barbara and San Clemente islands in 110 

 to 160 fms. ; off Tangola Tangola, Mexico; off Colombia in 18 fms. 



Bolivina minuta Natland 

 Plate 24, Figs. 4-7 



Bolivina minuta Natland, Bull. Scripps Instit. Oceanography, Tech. 

 Ser., vol. 4, 1938, p. 146, pi. 5, fig. 10. 



"Test very compressed, sides nearly parallel, periphery angled, flat- 

 tened, forming a slightly concave side; eight to ten pairs of chambers, 

 rapidly expanding from a subacute initial end ; sutures distinct, curved, 

 quite oblique; walls thin, very finely perforate; aperture a loop-shaped 

 opening in the top of the last chamber." Length 0.22-0.30 mm. ; breadth 

 0.15-0.17 mm.; thickness 0.04 mm. 



This small species is recorded from off Panama and off the coast of 

 California. In our material it occurs at several stations off Peru and off 

 Mexico. Our figures show some of the variations in the form and number 

 of the chambers in the microspheric and megalospheric forms. 



Stations: 536, 537, 569, 573, 2070, 2097, 2153. 



Distribution. — Off Guadalupe Island in 250 fms., southward into the 

 Gulf of California in 58 fms., and off the coast of Peru in 12-45 fms. 



Bolivina pisciformis Galloway and Morrey 

 Plate 24, Fig. 8 



Bolivina pisciformis Galloway and Morrey, Bull. Amer. Pal., vol. 15, 

 1929, p. 36, pi. 5, fig. 10. — Cushman, Contr. Cushman Lab. Foram. Res., 

 vol. 5, 1929, p. 93, pi. 13, fig. 26. — Palmer and Bermudez, Mem. Soc. 

 Cubana Hist. Nat., vol. 10, No. 5, 1936, p. 289. — Cushman, Special 

 Publ. 9, Cushman Lab. Foram. Res., 1937, p. 92, pi. 11, figs. 20, 21.— 

 Kleinpell, Miocene Stratigraphy of California, 1938, p. 279, pi. 4, fig. 10. 



