46 



LEA, ISAAC, LL.D.— (Coutinued.) 



Kemarks on Triquetra. (December 16th,) 



Vol. viii, No. 6, p. 300. Decomber, 1S5G. 



Remarks on the Visual Organs of rnionidio. (February 3d.) 



New Series, p. 17. Pebruary, 1857. 



Description of thirteen new Species of Uniones from Georgia. 

 (Read February 17th,) 



New Series, p. 31. February, 1857. 



Description of six new Species of LTuiones from Alabama. 

 (Read March 24th.) 



New Series, p. 83. Murch, 1SJ7. 



Description of eight new Species of Naiades from various parts 

 of the United States. (March, 24th.) 



Now Series, p. SI. Marcli, ]S.')7. 



Description of twelve new Species of Naiades from North Caro- 

 lina, (Read March 10th,) 



New Series, p. 85. March, 1S.>7. 



Descriptions of three new Exotic Species of Naiades. (March 

 24th.) 



New Series \>. 8J. Marcli, 18.^)7. 



Remarks on Unio Spinosus, (April 14th,) 



New Series, p. 101. April, 1857. 



Description of six new Species of Freshwater and Land Shells 

 of Texas and Tamaulipas. (Read April 7th.) 



New Series, p, 101. April, 1857. 



On change of name of certain Uniones, (May 5th.) 



New Series, p. 104. May, 1857. 



Description of twenty-seven new Species of Uniones from Geor- 

 gia. (June 23d.) 



Now Series, p. IC'J. Juue, 1857. 



Remarks on the Geographical Distribution of the Uniones. 

 (Read March 23d,) 



New Serie.«, p. 13. Marcb, 1858. 



Descriptions of new Species of Unio from Tennessee, Alabama, 

 and North Carolina. (Read March 23d.) 



New Serle.s, p. 10. Mareli, 1858. 



