304 LEA—LEB 
gular forms of Chinese species of Unio; Descriptions of four new 
species of Exotic Unionide ; Descriptions of twenty-six new species 
of Melanide of the United States; Descriptions of seven new species 
of Unio from North Carolina ; Descriptions of two new species of 
Unionide from Equador; and descriptions of Unionide from the 
Lower Cretaceous formation of New Jersey. (Tract.) 
8vo. Philadelphia, 1868 
Lea (Isaac). Notes on Microscopic Crystals included in some Minerals. 
(Tract.) 8vo. Philadelphia, 1869. 
——. Notes on Microscopic Crystals in some of the Gems, ete. (Tract.) 
8vo. Philadelphia, 1869. 
——. A Synopsis of the Family Unionide. 4th edition. 
4to. Philadelphia, 1870. 
Conchological and Mineralogical Papers, viz.:—Notes on Micro- 
scopic Crystals included in some Minerals; Further notes on Micro- 
scopic Crystals in some of the Gems, etc.; Descriptions of six new 
species of Freshwater Shells; Descriptions of three new species of 
Exotic Unionide ; Descriptions of twenty new species of Uniones 
of the United States; Descriptions of twenty-nine species of Unio- 
nide of the United States; Descriptions of seven new species of 
Unionidz of the United States; Descriptions of three new species 
of Uniones of the United States. [1869-1873.] (Tract.) 
8vo. Philadelphia, 1874. 
——. A Catalogue of Ais published works from 1817 to 1876. (Tract.) 
8vo. Philadelphia, 1876. 
——. Further notes on “ Inclusions” in Gems, etc. (Tract.) 
8vo. Philadelphia, 1876. 
——. See Fourxe (William Parker). . 
—— and Lea (Henry C.). Description of a new genus of the family 
Melaniana, and of many new species of the genus Melani, etc. ; 
also Descriptions of five new species of Anodonta, collected in the 
East Indies. (Tract.) 8vo. London, 1851. 
Lea (Thomas G.). Catalogue of Plants, native and naturalized, collected 
in the vicinity of Cincinnati, Ohio, during the years 1834-1844. 
(Tract. ) 8vo. Philadelphia, 1849. 
Leader (J. D.). See Briritsa Assocration. Sheffield Guide-Book. 
Lebesconte (Paul). See Trometin (Gaston le Goarant de). 
Leblanc (Félix). See Sarwr-Crarre Devizes (Charles). 
‘Lebossu (—). Manuel du toiseur en batimens. 1° partie. Terrasse et 
maconnerie. 12mo. Paris, 1832. 
Leboucher (—). Rapport sur un météore qui a ravagé les communes 
de Douvres et de Luc, prés Caen, au mois de Septembre, 1849. 

(Tract.) Ato. Caen, 1849. 
Lebour (G. A.). Notes on Staurolite, in connexion with Metamorphism. 
(Tract.) 8yo. London, 1873. 
——. The Geology of the Redesdale Ironstone District. (Tract.) 
| 8vo. Newcastle-on-Tyne, 1873. 
——. On the Deposits now forming in British Seas. (Tract.) 
8vo. London. 
——. On the Limits of the Yoredale Series in the North of England. 
(Tract.) 8yo. London, 1875. 

