48 



LEA, ISAAC, LL.D (Continued.) 



Descriptions of four new Species of Exotic Unionidso. (Read 

 July 5th.) 



New Series, p. 187. July, 1859. 



Change of name of Margaritana Etawahensis, to M. Georgiana. 

 (October 18th.) 



New Series, p. 280. October, 1859. 



. Description of a new Species of Unio from the Isthmus of Da- 

 rien. (Read October 18th.) 



New Series, p. 281. October, 1859. 



Remarks on Embryonic Shells of Uniones. (December 6th.) 



New Series, p. 329. December, 1859. 



Descriptions of three new Species of Exotic Uniones. (Read 

 December 6th.) 



New Series, p. 331. December, 1859. 



Remarks on the Number of Species of Unionidse in the United 

 States and Territories. (January 24th.) 



New Series, p. 3. January, 1860. 



Remarks on Abnormal Shells. (February llth.) 



New Series, p. 51. February, 1860. 



Remarks on the Coloring Matter of the Nacre of Unios. 

 (March 20th.) 



New Series, p. 88. March, 1860. 



Descriptions of four new Species of Unionidre from Brazil and 

 Buenos Ay res. (Read March 13th.) 



New Series, p. 89. March, 1860. 



Descriptions of fifteen new Species of Uruguayan Unionidoe. 

 (Read March 13th.) 



Now Series, p. 90. March, 1860. 



Descriptions of five new Species of Uniones from North Ala- 

 bama. (Read March 20th.) 



New Series, p. 92. March, 1860, 



Descriptions of four new Species of Melaniadae of the United 

 States. (Read March 20th.) 



New Series, p. 93. March, 1860. 



Remarks on a new form of Palpi of Anodonta. (April 10th. 



New Series, p. 97. April, 1860. 



