47 



LEA, ISAAC, LL.D.— (Continued.) 



Descriptions of a new Helix, and two new Planorbes. (Read 

 March 23d.) 



Now Serie.?, p. 11. March, 1S.j8. 



Remarks on the Soft Parts of Unionidai. (May IStli.) 



New Series, p. 114. IMny, 1858, 



Description of four new Freshwater Molkisks from the Isthmus 

 of Darien and Honduras. (Read ISfay.) 



New Seric, p. 118. May, 1858. 



Remarks on Ilnio Rubiginosus. (.Tunc 15th.) 



New Series, p. 1.35. June, 18.")8. 



Descriptions of seven new Species of Margaritana, and four new 

 Species of Anodonta. (Read June 22d.) 



New Scries, p. 138. .Tunc, ISjS. 



Descriptions of twelve new Species of Uniones, and other Fresh- 

 water Shells of the United States. (Read July 6th.^ 



New Series, p. 105. July, ISjS. 



Remarks on Triquetra Contorta. (October r2th.) 



New Series, p. 170. October, 1858. 



Description of eight new Species of Unionidte of Georgia, Mis- 

 sissippi, and Texas. (Read April oth.) 



New Series, p. 112. April, 1S5D. 



Descriptions of twenty-one new Species of Exotic UnionidcT. 

 (Read April 19th.) 



New Series, p. 1.31. May, 1S59. 



Descriptions of two new Species of Tnioncs from Georgia. 

 (Read April 19th.) 



New Series, p. 151. May, 1850. 



Descriptions of seven new Species of Uniones from South Ca- 

 rolina, Florida, Alabama, and Texas. (Read Mav 10th.) 



New Scries, p. 151. May, 1850. 



Description of twelve new Species of I'niones from Georgia. 

 (Read June 21st.) 



New Series, p. 170. June, 185t». 



Remarks on Dead Shells of Anodonta Lewisii, and Cyclas, 

 (July 5th.) 



Now Series, p. 177. July, 1859. 



