NORTH AMERICAN CONCSOLOGY. 



8^ 



Family Plicacea Lam. 



Pa. Fig. Pa. Fig. 



245 188 Tomatella puncto-striata Adams. 



Family Scalariana Lam. 



246 



Vermetus lumbrlcalis Lin. 

 Vermicularia lumbricalis Lam. 

 Vermetus lumbricalis Lam. 

 Serpula lumbricalis Lin, 

 247 189 Skenea serpuloides Montagu. 

 Helix serpuloides Mont. 

 Turbo serpuloides Turton. 

 Delphinula? serpuloides Ad.. 

 Delphinoidea serpuloidea Brown. 



248 Scalaria Nov-Angliae Couth. 



249 170* Grcenlandica Chemn. 



Turbo clathrus Groenlandicus 

 Cliemn. 

 S. planicosta Kiener. 

 subulata Couth. 



250 lineata Sni/. 



251 multistriata Say. 



Family Turl>iiiacea Lam. 



252 



Margarita cinerea Couth. 

 Turbo ciuereus Couth. 

 Trochus costalis Loven. 



253 171* obBCura Couth. 



Turbo obscurus Couth. 



254 172* undulata Sowb. 



Turbo incarnatus Couth. 



255 173* arctica Leach. 



M. helicoides Beck MSS. 

 Turbo infldtus Totten. 

 Paludina injlnta Menke. 



256 174* argentata Gould. 



257 175* Littorina rudis Don. 



Turbo rudis Don. 



oblir/atus Say. 



259 176* tenebrosus Mont. 



Turbo tenebrosus Mont. 

 vcslitus Say. 



260 177* palliata .?-///. 



Turbo palliatus Say. 



neritoides? Lin. 

 262 178* Lacuna vincta Mont. 

 Turbo vinctus Mont. 



quadrifasciatus Flem. 



L. periusa Conr. 



(var.) fusca. 

 263 170 Lacuna neritoidea Gould. 

 205 171 Cingula minuta Tott. 



266 172 aculeus Gould. 



267 Turritella erosa Couth. 



268 173 Interrupta Tott. 



269 174 Pyramis striatula Coicih. 



270 175 Odostomia producta Ada/ns. 



Jaminia producta Adams. 

 270 176 fusca Adams. 



Pyramis fusca Adams. 

 Jaminia fusca Adams. 



272 177 exigua Couth. 



Jaminia exirjua Couth. 

 Rissoa rupestris Forbes. 

 Turritella bisuturalis? Say. 



273 178 seminuda Adams. 



Jaminia seminuda Adams. 



274 179 trifida Tott. 



Actscon trifdus Tott. 



Family Canalifera Lam. 



275 180 Cerithium Emersonii Admns. 



276 181 terebrale Ad<niis. 

 nigrocinctum Adams. 

 Sayi Menke. 



C. retirulatum Tott. 

 Pasithea niyra Tott. (young). 



277 182 



278 183 



279 184 Greenll Adams. 



280 185 Pleurotoma decussata Couth. 



281 186 bicarinata Couth. 



282 187 plicata Adorns. 



283 190 Cancellaria Couthouyi Jay. 



C. buccinoides Couth. 



