70 THE NAUTILUS. 



Mytilus hamatus Say, common on the jetties. 



Mytilus exustus Linn., associated with hamatus, from which it is 

 easily separated by its finer striae and smaller size. 



Modiola polita Verrill, 3 young specimens. 



Congeria cochleata Kirby, found among clusters of M. hamatus as 

 if seeking protection. 



Area floridana Conrad, odd and broken valves were plentiful. 



Area incongrua Say, 3 living specimens taken, odd valves common. 



Area occidentalis Ph., odd valves and pieces. 



Phacoides pectinatus Gmel., odd and broken valves. 



Cardita floridana Conrad, odd valves plentiful. 



Cardium iscoardia Linn., odd and broken valves common. 



Cardium magnum Born, odd valves common. 



Cardium robustum Sol. (?), one young odd valve. 



Dosinia discus Reeve, a few living ones taken, dead ones common. 



Donax variabilis Say, one of the most plentiful species on the 

 beach both living and dead. 



Chione cancellata L., odd valves. 



Chione intapurpurea Conrad, odd valves. 



Tellina radiata Linn., odd valves. 



Macoma constricta Brug., odd valves. 



Iphigenia braziliana Lam., a few live ones taken. 



Martesia cuneiformis Say. An old water-logged banana stalk 

 thrown up by the tide, contained a number of nice specimens which 

 were secured by the aid of a knife ; also the shell-lined burrows of a 

 Teredo were in this stalk. 



Pinna sp., broken pieces. 



Siphonaria lineolata Orbigny., numerous on the rocks of the jetties. 



Crepidula aculeata Gmel., one poor specimen. 



Cerithidea iostoma Pfr., a few dead specimens. 



Terebra cinerea Gmelin. Living ones were common, mostly quite 

 young, exposed to view as the waves receded, always turning head 

 toward the current and immediately burying themselves in the sand. 



Natica duplicata Say, one young specimen. 



Natica brunnea Link, two dead and not mature. 



Columbella obesa C. B. Adams, three found on a log thrown up 

 by the tide. 



Melongena melongena L., one specimen, dead and poor. 



Purpura haemastoma Linn., common on the rocks of the jetty, no 

 full-grown ones found. 



