NO. 30 



SMITHSONIAN EXPLORATIONS, I ' ) 1 2 



6l 



During the cruise from Miami to Key West, a special effort was 

 made to examine as manv of the kevs as could be reached conven- 



Fig. 67. — One of the commonest shells on the Bahama eroded rock beaches, 

 Tectarius muricatus L. Photograph by Bartsch. 



iently for Cerion incanum Binney, and, wherever found, to gather a> 

 large a series as possible. Jt was observed that most of die keys 



