* Rissoa minuta, Tott. 



* Rissoa latior, Migh. 



* Rissoa aculeus, Gld. 



* Rissoa multilineata, Stm. 



* Rissoa Mighelsii, Stm. 

 Rissoa exarata, Stm. 



* Rissoa carinata, Migh. 



* Lacuna vincta, Mont. 

 Lacuna neritoidea, Gld. 



* Littorina litorea, Lin. 

 Littorina palliata, Say. 

 Littorina rudis, Mont. 



* Littorina tenebrosa, Mont. 



* Littorina irrorata, Say. 



Scalariidae. 



* Scalaria lineata, Soy. 



* Scalaria multistriata, Say. 



* Scalaria novangliae, Couth. 

 Scalaria groenlandica, Perry. 



Turritellidae. 



* Caecum pulchellum, Stm. 



* Vermetus radicula, Stm. 



* Turritella erosa, Couth. 



* Turritella reticulata, Miph. 



* Turritella costulata, Mic/h. 



* Turritella acicula, Stm. 



Ceritbiidae. 



Aporrhais occidentalis, Beck. 

 Bittium nigrum, Tott. 

 Bittium Greenii, C. B. Ad. 

 Triforis nigrocinctus, C. B. Ad. 



Pyramidellidae. 



Odostomia producta, C. B. Ad. 

 Odostomia fusca, C. B. Ad. 



* Odostomia dealbata, Stm. 



* Odostomia modesta, Stm. 

 Odostomia bisuturalis, Sny. 



