THE NAUTILUS. 



Tagelus gibhus Spengl. Common. 



Tagelus devisus Spengl. Common. 



Tellina alternata Say. Common. 



Tellina polita Say. Common. 



Tellina tenera Say. Common on the bar below the United States 

 Barracks. 



Tellina braziliensis Lam. A few single valves. 



Macoma tenia Say. Not common. 



Macoma constrida Brug. A few single valves. 



Donax variabilis Say. Common. 



Donax obesa d'Orb. Common at the mouth of the Lagoon. 



Petricola pholadtiformis Lam. Common. 



Petricola typicus Jonas. One specimen from a coquina rock at 

 Matanzas Inlet. 



Vemis mercenaria L. Common. 



Vemis cancellata L. A few single valves. 



Callista gigantea Gmel. Not common. 



Dosinia discus Reeve. Common. 



Cyrena carolinensis Bosc. Common in small brackish-water 

 streams. 



Sphcerium partuviium Say. Common in Moultrie Creek. 



Spluerium contractum Prime. A few near St. ^Mark's pond. 



Cardium magnum Born. Common. 



Cardium muricatum L. Not common. 



Lcevicardium serratum L. Rare. 



Chama arcinella L. A few single valves. 



Clunna macrophylla. Not common. 



Lucina dentata AVood. Common. 



Lucina crenulata Conr. Not common. 



Loripes edentula L. Large single valves are cjuite common but 

 living examples are rare. 



Solemya velum Say. Two sjjecimens. 



Parastarfe triquetra Say. Not common. 



Cardita tridentata Say. Not common. 



JJnio blandingianus Lea. Common in Cowan's Swamp. This is 

 one of the Florida species that is able to survive a long time out of 

 water. 



Uuio fuscatus Lea. Common in the upper part of Moultrie Creek . 



Unio nigrinus Lea. Common in tributaries of the St. John's 

 River west of St. Augustine. 



