302 



LEA 



Lea (Isaac). [On the great size and weight to which some of the Naiades 

 attain in the waters o£ the Valley of the Ohio.] (Tract.) 



8vo. Philadelphia ?, 1854. 



■ . [On the soft parts of the American Fresh- water Molluscs.] 



(Tract.) Syo. Philadelphia'^, 1854. 



. Description of a new Mollusk from the Eed Sandstone near 



Pottsville, Pa. (Tract.) 8vo. Philadelphia, 1855. 



. Possil Footmarks in the Eed Sandstone of Pottsville, Pennsyl- 

 vania. Fol. Philadelphia, 1855. 



. Extracts of papers from the Proceedings of the Academy of 



Natural Sciences of Philadelphia. (Tracts. )j 



8vo. Philadelphia, 185G. 



. Description of four new Freshwater Mollusks from the Isthmus 



of Darien and Honduras. (Tract.) 8vo. Philadelphia, 1858. 



. Descriptions of a new Helix and two new Planorhes. (Tract.) 



8vo. Philadelphia, 1858. 



. Descriptions of eight new species of Unio from Tennessee, Ala- 

 bama, and North Carolina. (Tract.) 8vo. Philadelphia, 1858. 



. Descriptions of seven new species of Margaritance, and four new 



species of AnodontcB. (Tract.) 8vo. Philadelphia, 1858. 



. Descriptions of twelve new species of TJniones and other Fresh- 

 water Shells of the United States. (Tract.) 8vo. Philadelphia, 1858. 



. Descriptions of twenty-seven new species of Unionesimm G-eorgia. 



(Tract.) 8vo. Philadelphia, 1858. 



. Margaritana complanata and Unio multiplicatus. (Tract.) 



8vo. Philadelphia, 1858. 



. On the Age of the Eed Sandstone of Pennsylvania. (Tract.) 



8vo. Philadelphia, 1858. 



. On the Cretaceous Formation of the United States. (Tract.) 



8vo. Philadelphia, 1858. 



. On Unio ruhiginosus. (Tract.) 8vo. Philadelphia, 1858. 



. Eemarks on the Unionidse of Nebraska Territory and Eed Eiver 



of the North. (Tract.) 8vo. Philadelphia, 1858. 



. (Check-list of the Shells of North America.) Unionidse. (Tract.) 



8vo. Washington, 1860. 



. Descriptions of eight new species of UnionidsB from Greorgia, 



Mississippi, and Texas ; of twenty-one new species of Exotic Unio- 

 nidse ; and of two new species of Uniones from Greorgia ; Eemarks 

 on the death of Alexander von Humboldt ; Descriptions of twelve 

 new species of Uniones from Georgia, and other papers on Unionidae, 

 etc. (Tract.) 8vo. Philadelphia, 1860. 



. Publications on ]'ecent Conchology, extracted from a list of 



American Writers on recent Conchology, by George "W. Try on, Jun. 

 (Tract.) 8vo. Philadelphia, 1861. 



. Check-list of the Shells of North America. Unionidae. (Tract.) 



8vo. Washington, 1862. 



. Conchological Papers : — Eemarks on the number of Unionidae ; 



Descriptions of fifteen new species of Uruguayan Unionidae ; De- 

 scriptions of four new species of Unionidae from Brazil and Buenos 

 Ayres ; Eemarks on the color of the Unionidae ; Descriptions of 

 four new species of Melanice of the United States ; Descriptions of 



