NORTH AMERICAN CONCIIOLOGY. 



95 



Vermetus lumbricalis Lain.. 

 Skenea serpuloides Flem. 



Delphinula serpuloidcs Ad. 

 Scalaria Grcenlandica Gld. 

 S. subulala Couth. 

 lineata Say. 

 multistriata Say. 

 Nov-Angliae Couth. 

 Margarita cinerea Gould. 

 Turbo cinereus Couth. 

 argentea Gould. 

 arctica Leach. 



Turbo inflatus Totten. 

 obscura Gould. 



Turbo obscurus Couth. 

 undulata Sou-b. 



Turbo incamatus Couth. 

 Littorina palliata Gould. 

 Turbo palliatus Say. 

 rudis Gould. 



Turbo obligatus Say. 

 tenebrosa Gould. 

 Turbo vestitus Say. 

 Lacuna neritoidea Gould. 

 vincta Gould. 



L. pertusa Conr. 

 fusca Adams. 

 Cingula aculeus Gould. 



Turbo aculeus Adams. 

 minuta Goidd. 



Turbo minuta Totten. 

 Turritella erosa Couth. 



interrupta Totten. 

 Pyramis striatula Couth. 

 Odostomia exigua Gould. 

 Jaminia exigua Couth. 

 fusca Goidd. 

 producta Gould. 



Jaminia producta Ad. 

 seminuda Gould. 

 trifida Goidd. 



Acteon trifidus Totten. 

 Cerithium Emersonii Ad. 

 Greenii Adams. 

 nigrocinctum Adams. 



