



47 



LEA, ISAAC, LL.D. (Continued.) 



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

 March 23d.) 



New Series, p. 41. March, 1858. 



Remarks on the Soft Parts of Unionidae. (May 18th.) 



New Series, p. 114. May, 1858, 



Description of four new Freshwater Mollusks from the Isthmus 

 of Darien and Honduras. (Read May.) 



New Scrie, p. 118. May, 1858. 



Remarks on IJnio Rubiginosus. (June 15th.) 



New Scries, p. 135. June, 1858. 



Descriptions of seven new Species of Margaritana, and four new 

 Species of Anodonta. (Read June 22d.) 



New Series, p. 138. June, 1858. 



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

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



Xcw Series, p. 165. July, 1858. 



Remarks on Triquetra Contorta. (October 12th.) 



New Scries, p. 170. October, 1858. 



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

 sissippi, and Texas. (Read April oth.) 



New Scries, p. 112. April, 1859. 



Descriptions of twenty-one new Species of Exotic Unionida?. 

 (Read April 19th.) 



New Scries, p. 151. May, 1859. 



Descriptions of two new Species of Uniones from Georgia. 

 (Read April 19th.) 



New Series, p. 154. May, 1859. 



Descriptions of seven new Species of Uniones from South Ca- 

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



New Series, p. 154. May, 1859. 



Description of twelve new Species of Uniones from Georgia. 

 (Read June 21st.) 



New Series, p. 170. June, 1859. 



Remarks on Dead Shells of Anodonta Lewisii, and Cyclas. 

 (July 5th.) 



New Scries, p. 177. July, 1859. 



