41 

 LEA, ISAAC, LL.D,, Philadelphia, 



IN PROCEEDINGS OF THE AMERICAN PHILOSOPHICAL SOCIETY, PHILA. 

 Including Remarks made by Mr. Lea, before the Society. 



Description of Melania Cincinnatiensis. (Read Dec. 21.) 



Vol. i., No. 5, p. 66. Nov.-Dec., 1838. 



Description of Nineteen -New Species of Colimacea. (Read 

 February 21.) 



Vol. L, No. 10, p. 173. Jan.-Feb., 1840. 



Description of New Freshwater and Land Shells. (Read Oct. 2.) 



Vol. i., No. 13, p. 285. Aug.-Oct, 1840. 



Continuation, (Road January 15th,) Vol. ii., No. 16, p. 11. February, 1841. 

 Continuation, (Read February 19th,) Vol. ii., No. 17, p. 30. March-April, 1841. 

 Continuation, (Read June 18th,) Vol. ii., No. 19, p. 81. July-Oct, 1841. 

 Continuation, (Read October 21st,) Vol. ii., No. 23, p. 224. July-Oct., 1842. 

 Continuation, (Read December 16th,) Vol. ii., No. 24, p. 242. Nov.-Dec., 1842. 

 Continuation, (Read May 16th,) Vol. iv., No. 33, p. 163. May-Aug., 1845. 



Statement that Melania Altilis, hitherto supposed to be southern, 

 is found in the Schuylkill River. (March 4th.) 



Vol. ii., No. 21, p. 150. January-April, 1842. 



On Turbinated and Discoidal Shells. (November 18th.) 



Vol. ii., No. 24, p. 234. Nov.-Dec., 1842. 



Change of Specific Names of Melania}. (December 2d.) 



Vol. ii., No. 24, p. 237. Nov.-Dec., 1842. 



Remarks on a Paper by Mr. Agassiz, in Proceedings Bost. Soc. 

 (March 21st.) 



Vol. v., No. 46, p. 187. January-July, 1851. 



On the size and weight of Uniones. (April 4th.) 



Vol. v., No. 46, p. 191. January-July, 1851. 



Letter to Louis Agassiz on Uniones. (Read Sept. 16, 1851.) 



Vol. v., No. 47, p. 220. July, 1851-Feb., 1852. 



List of Shells described in three papers prepared for the Trans- 

 actions. (March 5th, 1852.) 



Vol. v., No. 48, p. 251. Feb.-Dcc., 1852. 



On the existence of a Fulcrum in certain American Helices. 

 (March 5th, 1852.) 



Vol. v., No. 48, p. 253. Feb.-Dec., 1852. 



Mr. Lea's written Papers here published, arc all elaborated in the 'Transactions," of 

 the Philosophical Society. 



