NORTH AMERICAN CONCHOLOGY. 251 



Say. — 4. On the Genus Ocytboe: 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. lOT.) 



p. ofrepr. Name. Locality. 



56 Ocythoe punctata Say. 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 Fresli 

 Water and Land Shells, not noticed in the systems. 



Page of Page of 

 Jonr. reprint. Name. Locality. 



13 59 Cyclostoma tricarinata Say. Delaware river. 



13 59 lapidaria Say. 



14 60 Lymnaea columella Say. 



15 8 Succinea ovalis Say. 



June, 1817. — The same concluded. 



17 8 Helix hirsuta Say. 



18 9 perspectiva Say. Lake Erie. 

 18 9 lineata Say. Philadelphia. 



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

 Water Shells of the United States. 

 123 9 Helix thyroidus Say. 



123 10 minuta Say. 



124 10 labyrinthica Say. 



125 60 Ancylus rivularia Say. 



125 61 Paludina limosa Say. Del. and Scliuyl. rivs. 



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

 of Fresh Water and Land Shells. 



276 10 Polygyra Say (n. g.) 



277 10 auriculata Say. Florida. 



277 11 avara Say. Florida. 



278 11 septemvolva Say. Florida and Georgia. 

 280 Gl Planorbis glabratus Say. South Carolina. 



231 12 Succinea campestria -Saj/. East Florida. 



282 13 Polyphemua glans Brug. Louisiana to Georgia. 



283 13 Olygyra Say (n. g.) 



283 13 orbiculata Say. East Florida. 



17 



