NORTH AMERICAN CONCHOLOGY. 



91 



Adams. — Description of a new Species of Thracia: by C. B. 

 Adams, Prof. Chera. and Nat. History in Middlebury College. 

 (From American Journal of Science, 0. S., vol. xliii, No. 1. 

 April-June, 1842.) 



Page. Name. 



145 Thracia inequalis Adams. 



(With three wood-cuts.) 



Locality. 

 Gulf of Mexico. 



Adams. — Fresh-Water and Land Shells of Vermont: by C. B. 

 Adams, A. M., Prof. Nat. Hist, in Middlebury College. (From 

 Thomson's History of "Vermont, Part I. Also published in 



f pamphlet form, 1842.) 



[With full descriptions of genera and species, and wood-cuts of some 

 species.] 



Page 

 Hist. Pam. 



151 1 Paludina decisa Say, fig. 



152 2 jntegra Say. 

 152 2 porata Say. 

 152 2 lustrica Say. 



152 2 Valvata sincera Say. 



152 2 Melania depygia Say, fig. 



153 3 Limnaea megasoma Say, 

 153 3 appressa Say. [fig. 

 153 3 gracilis Jay. 



153 3 pallida Adams. 



153 3 elodes Say. 



154 4 desidiosa Say. 

 154 4 caperata Say. 



154 4 Physa ancillaria Say. 



154 4 heterostropha Say, fig. 



154 4 gyrina Say. 



154 4 hypnorum Dr. 



P. elontjata Say. 



155 5 Planorbis trivolvis Say, 



P. lentus Say. [fig. 



corpulentus Say. 

 155 5 campanulatus Say. 

 155 5 bicarinatus Say. 

 155 5 armigerus Say. 



155 5 exacutus Say. 



156 6 parvus Say. 



159 9 



Planorbis deflectus Say. 



hirsutus Gould. 

 Succinea obliqua Say, fig. 



ovalis Say. 



avara Say. 



S. vermeta Say. 

 Bulimus lubricus Dr. 

 Pupa milium Gould. 



ovata Say. 



badia Adams. 



armifera Say. 



albilabris Ward, ined. 

 Cyclostoma marginata S. 



contracta Say. 



Tappaniana Ward, ined. 



exigua Say, fig. 

 Helix albolabris Say, fig. 



thyroidus Say. 



dentifera Binn. 



palliata Say. 



monodon Rack. 

 II. fratema Say. 



concava Say. 



(inch II. Vancouveren- 

 sis Lea. ) 



