NORTH AMERICAN CONCHOLOGY. 



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Crysodomus antiquua 



Swai?ison? Carp. 

 Murcx antiquus Linn. 

 Fusus antiquus Lam. 

 Tritonium ( Fusus) antiquum 

 Midd. 

 var. Behringiana'M.idd. 

 Middendorfii Cooper. 

 Tritonium (Fusus) decern- 

 costatum Midd., nee Say. 

 sitchensis Carp. [Midd. 

 Tritonium (Fusus) sitchense 

 Nassa mendica Gould. 



Gibbsii Cooper (n. sp.) 

 Purpura lactuca Esck. 

 Mvurex lactuca Esch. 



ferrugineus Esch. 

 P. septentrionalis Reeve. 

 Muricidia lactuca Carp, 

 ostrina Gould. [Desh. 



P. Freycinetii Midd., non 

 decemcostata Midd. 

 lapillus Linn. 

 emarginata Desh. 

 P. Conradi Nutt. 

 Monoceros engonatum Con. 

 Purpura (Monoceros) engo- 



nata Conr. 

 M. unicarinatum Reeve, 

 lapilloides Conr. 

 M. punctatum Gray. 

 Columbella gausapata Gld. 



valga Gould. 

 Natica Lewisii Gould. 



N. herculea Midd. 

 Potamis pullatua Gould. 



Cerithidie pullata Carp. 

 Melania plicifera Lea. 

 silicula Gould. 

 shortaensis Lea. 

 Amnicola Nuttalliana Lea. 

 Paludina Nuttalliana Lea. 

 aeminalis Hinds. 



Paludina seminalis Hinds. 

 Bithinia seminalis Carp. 



Page. 



374 Turritella Eschrichtii Midd, 



374 Littorina rudis Gould. 



L. Barclayana ? Hinds. 

 374 scutulata Gould. 



374 planaxis Nutt. 



375 Trochus filosus Wood. 



T. ligatus Gould. 

 modestus Midd. ? 

 375 Bchantaricus Midd. 

 375 Haliotis Kamtschatkiana 



Jonas. 

 375 Fisaurella nigropunctata 



375 aspera Esck, [Sowb. 



F. cratilia Gould ? 



denseclathrata Reeve? 



376 Nacella instabilis Carp. ? 

 376 Acmeea pelta Carp. ? 



376 persona Carp, ? 

 376 spectrum Carp.? 

 376 scabra Carp.? 

 376 aeruginosa Carp. ? 

 376 Scurria mitra Carp. ? 

 376 Chiton muscosus. 

 376 submarmoreus. 

 376 tunicatus. 

 376 lignosus. 

 376 Helix fidelis Gray. 



H. Nuttalliana Lea. 

 376 Townsendiana Lea. 



376 Columbiana Lea. 



H. labiosa Gould. 



377 Vancouverensis Lea. 

 377 devia Gould. 



II. Baskervillei Pfr. 

 377 tudiculata Binney. 

 377 Succinea Nuttalliana Lea. 



377 Limax Columbianus Gould. 



378 Lymnaea umbrosa Gould. 

 378 emarginata Say. 



378 jugularis Say. 



378 Physa elongata Say. 



378 heterostropha Say. 



378 bullata Gould. MS. 



378 Ancylus caurinus Coop. n. s. ? 



378 Planorbis corpulentus Say. 



