vi 
LEA, ISAAC, LL.D.—(Continued.) 
Remarks on Mulleria.. (November 224d, ae aa 
Vol. vi, No. 12, p. 435. December, 1853. 
Remarks on Gneiss bored by Pholas dactylus. (Dec. 13th.) 
Vol. vi, No. 12, p. 438. December, 1853. 
_-Remarks on Acostcea Guaduasana. (January 3d.) 
" “Vol. vii, No. 1, p. 1. Februrary, 1854. ‘ 
Rectification of Mr. T. A. Conrad’s “Synopsis of the Family of 
Naiades of North America,” published in the Proceedings of the 
Academy of Natural Sciences of Philadelphia, February, 1853, 
(Read February 7th.) 
Vol. vii, No. 6, p. 236. December, 1854. 
- Also Pamphlet. 
Description of a new sub-genus of Naiades. (Read April 1st.) 
Vol. viii, No. 2, p. 79. April, 1856. ; 
Description of a new species of Triquetra, KLEIN, (Hyria, LA- 
MARCK.) (Read April 1st.) 
Vol. viii, No, 2, p. 79. April, 1856. 
- Description of new Freshwater Shells from California. (Read 
April 1st.) 
Vol. viii, No. 2, p. 80. April, 1856. 
Descriptions of twenty-five new species of Exotic Uniones. 
(Read April 15th.) 
_ . Vol. viii, No. 2, p. 92. April, 1856. 
Description of four new species of Exotic Uniones. (Read May 
18th.) 
Vol. viii, No. 3, p. 108. June, 1856. 
Description of thirteen new species of Exotic Peristomata. 
(Read June 3d.) 
Vol. viii, No. 3, p. 109. . June, 1856. 
Descriptions of fifteen new species of Exotic Melaniana. (Read 
July 8th.) 
Vol. viii, No. 4, p. 144. August, 1856. 
Description of the Byssus in the Genus Unio. (Read Sept. 23d. ) 
Vol. viii, No. 5, p. 213. October, 1856. 
Description of eleven new species of Uniones from Georgia. 
(Read November 4th.) 
Vol. viii, No. 6, p. 262. December, 1856. 
