NO. 4 CUSHMAN AND MCCULLOCH : SOME VIRGULININAE 219 



EXPLANATION OF PLATE 26 



Figs. 



1-6. Bolivina seminuda Cushman, var. humilis Cushman and 

 McCulIoch, new variety. 1-3, x 120. 4, 5, x 90. 6, x 130. 1. 

 Holotype. 2, 3. Paratypes. aa, front views; bb, apertural 

 views. 



7-11. Boli'vina spissa Cushman. 7-9, x 70. 10, 11, x 80. a, front 

 view; b, apertural view. 



12, 13. Boli'vina striatula Cushman. x 90. 



14. Bolivina subadvena Cushman, var. serrata Natland. x 120. 



Oj front view ; b, apertural view. 



