U S NATIONAL MUSEUM 



BULLETIN 166 PLATE 9 



SPECIES OF HYPOCONCHA. 



1, //. sabulosa, ventral view of anterior part (after La Sagra and Guerin); 2, same species, female, five-sixths 

 natural size, dorsal view (after Herbst); 3, same, ventral view; 4, same species, male (66796) in its naUiral 

 habitat; 5, same, underneath bivalve shell; 6, //. pannmcnsis, female (40474), X 1^3, dorsal view; 7, same, 

 ventral view. 



