NO. 4 CUSHMAN AND MCCULLOCH: SOME VIRGULININAE 211 



The only occurrence of the typical form in these collections is from 

 Station 59. 



Distribution. — Station 59 is in the Gulf of California, Mexico, at 

 Ensenada de los Muertos in 150 fms. 



Bolivina seminuda Cushman, var. humilis Cushman and McCulloch, 



new variety 

 Plate 26, Figs. 1-6 



Variety differing from the typical in the lower chambers, more limbate 

 sutures, and the disappearance of the clear portion of the wall in the adult 

 chambers. 



Holotype of variety (AHF no. 44) from locality 56. 



The varietal form is much more common in these collections than is 

 the typical form. It is distinct from var. foraminata R. E. and K. C. 

 Stewart. 



Stations: 55, 56, 60, 62, 514, 525, 526, 531, 533, 552, 569, 574, 2000, 

 2098. 



Type locality. — Los Frailes Point, Mexico, in 160 fms. 



Distribution. — The station records indicated here are for the area off 

 Mexico near the type locality and off Colombia and Peru in 5 to 100 fms. 



Bolivina spissa Cushman 

 Plate 26, Figs. 7-11 



Bolivina subadvena Cushman, var. spissa Cushman, Contr. Cushman 

 Lab. Foram. Res., vol. 2, pt. 2, 1926, p. 45, pi. 6, f^gs. ^a, b; Bull. 

 Scripps Instit. Oceanography, Tech. Ser., vol. 1, 1927, p. 157, pi. 3, 

 fig. 10. — Cushman, Stewart and Stewart, Trans. San Diego Soc. Nat. 

 Hist., vol. 6, 1930, p. 67, pi. 5, fig. 7. — Cushman and Moyer, Contr. 

 Cushman Lab. Foram. Res., vol. 6, 1930, p. 58. 



Bolivina spissa Galloway and Wissler, Journ. Pal., vol. 1, 1927, p. 72, 

 pi. 11, figs. 14-16. — Cushman, Special Publ. 9, Cushman Lab. Foram. 

 Res., 1937, p. 118, pi. 14, figs. 12-15. — Adams, Amer. Journ. Sci., vol. 

 237, 1939, p. 507. 



Test 2% to 3 times as long as broad, gradually tapering, much com- 

 pressed, thickened along the median portion, periphery acute or even 

 slightly carinate, initial end occasionally with a very slight apical spine; 

 chambers numerous, distinct, slightly if at all inflated, much broader 

 than high throughout, increasing only slightly in relative height toward 



