NO. 30 SMITHSONIAN EXPLORATIONS, IQI12 61 
During the cruise from Miami to Key West, a special effort was 
made to examine as many of the keys as could be reached conven- 
Fic. 67—One of the commonest shetls on the Bahama eroded rock beaches, 
Tectarius muricatus L. Photograph by Bartsch. 
iently for Cerion incanum Binney, and, wherever found, to gather as 
large a series as possible. It was observed that most of the keys 
