NOETH AMERICAN CONCHOLOGT. 



63 



Page. 



72 Turbo vestita Sar/. 



72 obligatus Say. 



73 Inflatus Tott. 

 73 minutus Tott. 



73 incarnatus Couth. 



73 cinereus Couth. 



74 obscurus Couth. 



74 Cancellaria buccinoides Cou. 



74 Hostellaria occidentalla 



Gu^rin. 



74 Pyramis striatulus Couth. 



75 Modiola discrepans Mont, 

 75 Thracia Conradi. 



75 Bulla triticea Couth, 



75 Scalaria subulata Couth. 



76 Solemya borealis Totten. 



Conrad. — Observations on the Genns Gnathodon, with descrip- 

 tion of a New Species: by T. A. Conrad. (From Am, Journ. 

 Sci. and Art, 0. S., vol. xxxviii, No. 1, Oct. -Dec, 1839.) 



Page. Name. 



92 Gnathodon cuneata. 

 92 Grayi (fossil). 



92 fleaniosa Conr. (with a figure). 



Locality. 

 Gulf of Mexico. 

 Yorktown, Va. 

 Florida. 



Adams. — Description of Shells: by Prof. C, B. Adams. (From 

 same, vol. xxxix, No. 2, 1840.) 



Page. Name. 



373 Cerithium terebrale Adams. 



374 Planorbis virens Adams. 

 374 Limnaea acuminata Adams. 

 374 umbilicata Adams. 



374 pallida Adams. 



375 Cyclas elegana Adams. 



Locality. 

 New Bedford. 

 New Bedford. 



New Bedford & Wobum, Mass. 

 New Bedford. 

 Shoreham, Vt. 



Adams. — Shells of Fresh Pond : by Prof. C. B. Adams. (From 

 same, vol. xxxvi. No. 2, 1839. No descriptions.) 



Page. 



392 XTnio naautus. 



392 complanatus. 



392 radiatua. 



392 Anodonta implicata. 



392 Cyclas similis. 



392 Planorbis trivolvla. 



392 bicarinatus. 



392 deflectua? 



392 hirsutua, n. s. (descrip.) 



392 Anodonta cataracta = A. implicata. 



392 Valvata tricarinata. 



392 Succinea ovalis. 



392 Lymnea heterostropha. 

 392 columellaris. 



392 catascopium. 



392 Physa heterostropha. 



392 Paludina decisa. 

 392 lustrica ? 



