10 



Odostomia trifida, Tott. 



Odostotnia seminuda, C. B. Ad. 

 ' Odostomia impressa, Say. 



Turbonilla interrupta, Tott. 



Turbonilla nivea, Stm. 

 ■ Eulima oleacea, Stm. 



Menestho albula, Moll. 



Telutiiiidae. 



Velutina zonata, Gld. 



Velutina haliotoides, Milll. 



Lamellaria perspicua, Lin, 



IVaticidae. 



Natica pusilla, Say. 



Natica olausa, Sow. 



Lunatia heros, Say. 



Lunatia triseriata, Say. 



Lunatia groenlandica, Moll. 



Mamma ? immaculata, Tott. 



Neverita duplicata, Say. 



Bulbus flavus, Gld, 



Amauropsis helicoides, Johnst. 



Turritidae. 



Fleurotoma plicata, C. B. Ad, 

 Pleurotioma bicarinata, Couth. 

 Bela tutricula, Mont. 

 Bela harpularia, Couth. 

 Bela violacea, Migh. 

 Bela decussata, Couth. 

 Bela cancellata, Migh. 

 Bela pleurotomaria, Couth. 



Coluin1)ellidae. 



Columbella avara, Say. 

 Columbella rosacea, Gld, 

 Columbella lunata, Say, 

 Columbella dissimilis, Stm. 



Purpuridae. 



Purpura lapillus, Lin. 

 Nassa obsoleta, Say. 



