502 PROCEEDINGS OF THE AMERICAN ACADEMY 



Lea (Isaac, LL.D.). 



On Leaia Leidyi = Cypricardia Leidyi. Descriptions of Fourteen 

 New Species of Melanidae, etc. [Extr. from Proc. of Acad, of Nat. 

 Sc, Philadelphia.] 8vo. Philadelphia. 1866. 

 Leidy (Joseph, M. D., Prof., etc.). 



Cretaceous Reptiles of the United States. [From the Smithsonian 

 Contributions to Knowledge. Vol. XIV. I860.] 4to. Philadel- 

 phia. 1865. 

 Lesguereux (Leo). 



On the Origin and Formation of Prairies. [From Am. Jour, of 

 Sc. & Arts. 2d Ser. Vol. XXXIX. No. 117.] 8vo. New 

 Haven. 1865. 

 Loring (Hon. Charles G.). 



The Civil War in America : An Address read at the last Meet- 

 ing of the Manchester Union and Emancipation Society. By Gold- 

 win Smith. 8vo pamph. London. 1866. 

 McChesney (J. H., A. M.). 



Plates illustrating in Part the New Species of Fossils from the 

 Palaeozoic Rocks of the Western States. (Chicago Academy of 

 Sciences.) Chicago. 

 Mackall (Louis, M. D.). 

 - An Essay on the Life in Nature. 8vo pamph. Washington. 1855. 

 An Essay on the Law of Muscular Action. 2d edition, corrected 

 and enlarged. 8vo pamph. Washington. 1865. 



Extract from an Unpublished Essay on Physical Force. 8vo 

 pamph. Washington. 1865. 

 Marcou (Jules). 



Une Reconnaissance Geologique au Nebraska. [Extr. du Bull, 

 de la Soc. Geol. de France. 2 e Ser. Tome XXI. pp. 132.] 8vo. 

 Paris. 1864. 



Notice sur les Gisements des Lentilles Trilobitiferes Taconiques 



de la Pointe-Levis, au Canada. Extr. du Bull Tome XXL 



pp. 236. 8vo. Paris. 1864. 

 Martins (Br. 0. F. Ph. von). 



Vortrage iiber die Florenreiche oder Imperia Florae. Separat- 

 druck aus den Jahresberichten der Bayer. Gartenbau-Gesellschaft 

 zu Miinchen. 16mo pamph. Munich. 1865. 

 Mayer (Alfred M.). 



Essay on the Velocity of Light. By M. Delaunay of the Institute 



