8 
LEA, ISAAC, LL.D.—(Continued.) 
Remarks on Triquetra. (December 16th.) 
Vol. viii, No. 6, p. 300. December, 1856. 
Remarks on the Visual Organs of Unionide. (February 84d.) 
New Series, p.17. February, 1857. 
Description of thirteen new species of Uniones from Georgia. 
(Read February 17th.) 
New Series, p. 31. February, 18957. 
Description of six new species of Uniones from Alabama. 
(Read March 24th.) 
New Series, p. 83. March, 1857. 
Description of eight new species of Naiades from various parts 
of the United States. (March, 24th.) 
New Series, p. 84. March, 1857. 
Description of twelve new species of Naiades from North Caro- 
lina. (Read March 10th.) 
New Series, p. 85. March, 1857. 
Descriptions of three new Exotic species of Naiades. (March 
24th.) 
New Series, p. 85. March, 1857. 
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.) 
New Series, p. 169. June, 1857. 
Remarks on the Geographical Distribution of the Uniones. 
(Read March 23d.) 
New Series, p. 13. March, 1858. 
Descriptions of new species of Unio from Tennessee, Alabama, 
and North Carolina. (Read March 238d.) 
New Series, p. 40. March, 1858. 
