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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. i., 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, (Read 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 Melani. (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 65th, 1852.) 
Vol. v., No. 48, p. 251. Feb.~Dec., 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, are all elaborated in the ‘‘Transactions,” of 
the Philosophical Society. 
