NORTH AMERICAN CONCHOLOGY. 



257 



Say. — 4. On the Genus Ocythoe: being an extract of a letter 

 from Thos. Say, Esq., of Philadelphia, to Wm. Elford Leach, 

 M. D., F. R. S. (From the Philosophical Transactions of the 

 Royal Society, 1819, p. 107.) 



P. of repr. Name. 



56 Ocythoe punctata Say. 



Locality. 

 Atlantic ocean, near N. A. coast. 



Say. — 5. Numerous Articles from the Journal of the Academy 

 of Natural Sciences of Philadelphia. 



Vol. I. May, 1817. — Description of seven species of American Fresh 

 Water and Land Shells, not noticed in the systems. 



123 

 123 

 124 

 125 

 125 



276 

 277 

 277 

 278 

 280 

 281 

 282 

 283 

 2S3 



October, 1817. — Descriptions of new species of Land and Fresh 

 Water Shells of the United States. 



9 Helix thyroidus Say. 

 10 minuta Say. 



10 labyrinthica Say. 



60 Ancylus rivularis Say. 



61 Paludina limosa Say. 



Del. and Schuyl. rivs. 



June, 1818. — Account of two new genera, and several new species, 

 of Fresh Water and Land Shells. 

 10 Polygyra Say (n. g.) 



10 auriculata Say. 



11 avara Say. 



11 septemvolva Say. 

 61 Planorbis glabratua Say. 



12 Succinea campestris Say. 



13 Polyphemus glans Drug. 

 13 Olygyra Say (n. g.) 

 13 orbiculata Say. 



17 



Florida. 



Florida. 



Florida and Georgia. 



South Carolina. 



East Florida. 



Louisiana to Georgia. 



East Florida. 



