NORTH AMERICAN CONCHOLOGT. 



16t 



33 



33 



33 



33 

 33 



35 

 35 

 35 



Paludinidae. 



Page. 



32 Melania depygis SaT/. 



33 Paludina decisa Say. 

 33 Amnicola porata Gould. 

 33 pallida Eald. 



33 Valvata tricarinata Say. 



33 sincera Say. 



33 pupoidea Gould. 



Lrittorimidae. 



Littorina rudis Gould. 



Nerita littorea 0. Fabr. 

 Turbo rudis Don. 



tenebrosus Mont. 34 

 obligatus Say. 

 vestiius Say. 34 



L. Gronlandica Moll. 34 



tenebrosa 'Forbes. 

 littoralis F. et H. 

 Nerita littoralis L. 

 Turbo palliatus Say. 34 



L. palliata Gould. 34 



ncritoides De Kay. 

 irrorata Gray, 34 



Turbo irroratus Say. 34 



Pliasianella sulcata Lam. 

 Lacuna vincta Turtou. 



Turbo divaricatus 0. Fabr. 35 

 vinclus Mont. 

 neritoidea Gould. 

 Rissoa minuta St. 



Turbo luinutus Tott. 

 C'inyula minuta Gould. 



Tiiriitellidac. 



Turritellacostulata J/. et^W. 35 Turritella acicula (S^ 



Rissoa modesta St. 



Cingula modesta H. C. Lea. 

 Isvis De Kay ? 

 latior St. 



Cing, latior Migb. et. Ad. 

 eburnea St. (pi. i, fig. 1). 

 aculeus St. 



Cingula aculeus Gould. 

 Pali'.dinella aculeus 



Middendorff? 

 multilineata St. (pl.i, f. 2). 

 Mighelsii St. 



Cingula arenarialA. et Ad. 

 exarata St. (pi. i, fig. 3). 

 pelagica St. 



Cingula semicostata Migli. 

 et Ad. 

 Skenea planorbis F. et H. 

 Turbo planorbis 0. Fabr. 

 S. serpuloides Gould. 



areolata St. 

 erosa Couth. 



(pl. i, fig. 5). 

 3(3 Ccecum pulchellum St. 



(pl. ii, fig. 3). 



Ceritliiadac. 



37 Aporrhaisoccidentalis /JecL 



lu/stcllaria occidrntulis 



Gould. 



37 Cerithium Sayi Menke. 



37 Greenii Adams. 



37 nigrocinctum Adams. 



Vermctidac. 



37 Vermetus radicula St. I 



r. I umbriculis Gonld. 



V. bicarinatus Desli. ? 

 Knorrii Desh. V 



