43 



LEA, ISAAC, LL.D.-^Continued.) 



CoiUiiuiiitiun— UcikI J;iii. 2il, ]8.",j.— Ndl. vi., p. ]i). 18:59. (Is.suod in Syn. l.^toil., IS.'JO.) 



Synopsis of the Family of Nai'adcs. 



Vol. vi, p. 113. lS3',t. 



Oa the Patelha Ania'iia of say. (Read March 6th, 1840.) 



Vol. vii, p. 73. 1S41. 



Descriptions of nineteen new species of Colitnacea. (Read Feb- 

 ruary 21, 1840.) 



Vol. vii, p. 455. 1841. (In Proceedings January-February, 1840.) 



Descriptions of new Freshwater and Land Shells. (Read Jan. 

 15th, 1841.) 



Vol. viii, p. 163. 1843. (In riiilos. Proceedings, February, 1841.) 



Continuation— Read Dec. 21, 1838.— Vol. viii., p. 190. 1843. (In Philos. Proc. Dec. 1838.) 



" Oct. 2, 1840. " p. 191. " " " Oct. 1840.) 



" Feb.19,1841. " p. 230. " " " April, 1841.) 



" June IS, " " p. 242. " " " Oct. " 



" Oct. 21,1842. " p. 246. " " "Oct. 1842.) 



'• Feb. 19,1841.— Vol. i.\-., p. 1,1846. 



" June 18, " " p. 17, " 



" Dec. 16,1842, " p. 24, " (In Proceedings Dec. 1842.) 



" Aug. 18,1843, •' p. 275, " (Printed paper dist.Aug.l9, " 



" May 2, 1845.— Vol. X-., p. 67,1853. (In Pliilos. Proc. Aug. 1845.) 



Catalogue of the Genus Melania Recent, and Fossil. 



Vol. X, p. 96. 1853. 



Descriptions of new species of the Family Unionidfe. (Read 

 March 5th, 1852.) 



Vol. X, p. 253. 1853. 



Description of a new Genus (Basistoma) of the Family Melani- 

 ana, together with some new species of the American Melania?. 

 (Read March 5th, 1852.) 



Vol. X, p. 295. 1853. 



