LIST OF AUTHORS, 



AND THEIR CONTRIBUTIONS. 



Anthony, John G. 



Page. 



Descriptions of New American Fresh-water Shells, - - 144 



Bland, Thomas. 



Remarks on the Origin and Distribution of the Operculated 

 and Inoperculated Land Shells which Inhabit the Continent 

 of America and the West Indies, with a Catalogue of the 

 American Species, ------- oi, 136, 349 



Note on the Internal Structure of Megaspira, ... 64 



Descriptions of New Species of North American Land Shells, 371 



Carpenter, P. P. 



On the Acrngeidse of the Vancouver and Californian Province, 332 



Conrad, T. A. 



Illustrations of Miocene Fossils, with Descriptions of New Spe- 

 cies, - - - 05 



Note on the Genus Gadus, with Descriptions of some New 



Genera and Species of American Fossil Shells, - - 75 



Descriptions of New Species of Australian Fresh-water Shells, 79 



Further Observations on Mr. Gabb's Palaeontology of California, 97 



Observations on Recent and Fossil Shells, with Proposed New 



Genera and Species, ------- 101 



Descriptions of New Species of Tertiary, Cretaceous and Re- 

 cent Shells, --------- 104 



Description of a New Species of Unio, - - - - 107 



Descriptions of American Fresh-water Shells, - - - 278 

 Descriptions of New Marine Bivalve Shells, - - - 280 



Crosse, H. 



A Well-abused Mollusk, ------- 294 



