NO. 4 CUSHMAN AND MCCULLOCH: SOME VIRGULININAE 185 



Family Buliminidae 



Subfamily Virgulifiinae 



Genus VIRGULINA d'Orbigny, 1826 



Virgulina seminuda Natland 



Plate 21, Fig. 1 



Virgulina seminuda Natland, Bull. Scripps Instit. Oceanography, 

 Tech. Sen, vol. 4, 1938, p. 145, pi. 5, fig. 12. 



"Test elongate, slender, oval in cross section, broadest near the mid- 

 dle tapering to an acute initial end usually with a short spine; apertural 

 end subacute; chambers rapidly increasing in height, four pairs usually 

 making up the biserial stage, triserial stage very short; sutures distinct; 

 walls with a band of clear shell material surrounding a finely perforate 

 and relatively opaque area, clear shell area iridescent; aperture subtermi- 

 nal, loop shaped. Length 0.50 mm.; breadth 0.12 mm.; thickness 0.10 

 mm." 



This species described from the coast of California occurred at Station 

 231 in typical form. 



Distribution. — The station record of 231, listed with the stations off 

 Mexico, is off California, Smuggler's Cove, Santa Cruz, 10 fms. This 

 record is one of several which deviate from the general plan of labeling 

 bottom samples at the Foundation. 



Genus BOLIVINA d'Orbigny, 1839 



Bolivina acerosa Cushman, var. pacifica Cushman and McCulloch, 



new variety 

 Plate 21, Figs. 2, 3 



Variety differing from the typical in the somewhat larger size, lack 

 of ornamentation of the early portion, and the distinct clear areas at the 

 upper and inner portion of each chamber. 



Holotype of variety (AHF no. 42) from Station 60. 



The typical form of the species is from the Miocene of Haiti. 



The varietal form shows very little variation, although specimens are 

 numerous at some of the stations. It has a wide range along the coast of 

 the eastern Pacific. 



