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BIBLIOGRAPHY OF 



Page. 



26 Pecten Islandicus Lam. 

 26 concentricus Say. 



26 Ostrea Canadensis Lam. 

 26 Virginica Lam. 



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26 Ostrea edulis Lin. (rar.) 

 26 Anomia ephippium Lin. 

 26 Terebratula. 



An undescribed recent sp 



Chiton. 



One species. 

 Patella alveus Conrad. 



amcena Say. 

 Crepidula fornicata Say 



glauca Say. 



plana Say. 



convexa Say. 



Class XII. MOL.LUSCA. 



Order II. Gasteropoda. . 



27 Ancylus rivularis Say. 

 27 Velutina rupicola C 

 27 Bulla solitaria Say. 

 27 Limax. 



One or more species. 

 27 Testacella. 



One or more species. 



Order III. Traclielipoda. 



Helix albolabris Say. 27 



thyroidus Say. 27 



alternata Say. 27 



perspectiva Say. 27 

 glaphyra Say. 



arborea Say. 27 



tridentata Say. 27 



hirsuta Say. 27 



fraterna Say. 28 



labyrinthica Say. 28 

 minuta Say. • 28 



subglobosa (MSS.) 28 



Pupa fallax Say. - 28 



corticaria Say. 28 



Succinea ovalis Say. 28 



campestris Say. 28 



Auricula niyosotis Drop. 28 



Planorbis trivolvis Say. 28 



bicarinatus Say. 28 

 armigerus Say. < 28 



campanulatus Say. 28 



parvus Say. 28 



Two or more other species. 28 



Physa heterostropha Say. 28 



Lymncea catascopium Say. 28 



columella Say. 28 



ovata I. n in. 28 



Two or more other species. 28 



Valvata arenifera Lea. 

 Paludina decisa Say. 



limosa Say. 



lapidaria Say. 



One other species. 

 Natica duplicata Say 



heros Say. 



triseriata Soy. 

 Melampus bidentalis Say. 

 Vermetus lumbricalis Lam. 

 Lacuna pertusa Con 



fusca (MSS.) 

 Turbo obligatus Say. 



palliatus Say. 



vestita Say. 



irroratus Say. 



inflatus Totten. 



minutus Totten. 

 Turritella alternata Say. 



bisuturalis Say. 

 Fusus corneus Say. 



cinereus Say. 



decemcostatus Say. 

 Pyrula caniculata Lam. 



carica J. am. 

 Ranella caudata Say. 

 Purpura lapillus Lam. 



imbricata Lam. 



