NOETH AMERICAN CONCHOLOGY. 



329 



79 



Unio nasutus 5ay. 



79 



Fisherianus Lea. 



79 



complanatus Sol. 



79 



radiatus Lam. 



79 



heterodon Lr-a. 



79 



Alasmodontamarginata/S'a?/. 



79 



undulata Saij. 



79 



Anodonta cataracta Say. 



79 



implicata Say. 



79 



areolata Swains. 



80 



Tebennophorus Carolinen- 





sis Ljtnn. 



80 



Limax agrestis JLulL 



80 



Helix albolabris Say. 



80 



alternata S<iy. 



SO 



arbor ea Say. 



80 



chersina Say. 



80 



concava Say. 



80 



electrina Gould. 



80 



fraterna Say. 



80 



fuliginosa Grif. 



80 



gularis Say. 



80 



hirsuta Say. 



80 



inflecta Say. 



80 



indentata Say. 



80 



labyrinthica Say. 



80 



ligera Say. 



80 



lineata Say. 



80 



pulchella Gould. 



80 



minuscula Dinn. 



80 



suppressa Say. 



80 



thyroidus Say. 



80 



tridentata Say. 



81 



Succinea avara Say. 



81 



campestria Say. 



81 



ovalis Gould. 



81 



obliqua Say. 



81 



Bulimus fallax Goidd. 



81 



lubricus Gould. 



81 



Pupa armifera Say. 



81 



Pupa contracta Say. 



81 



pentodon Binn. 



81 



procera Gould. 



81 



rupicola Say. 



81 



Vertigo milium Gould. 



81 



ovata Say. 



81 



Carychium exiguum Gould. 



81 



Ancylus fuscus Adams. 



81 



rivularis Say. 



81 



tardus Say. 



81 



Lymnea columella Say. 



81 



desidiosa Say. 



81 



caperata Say. 



81 



macrostoma Say. 



81 



modicellus Say. 



81 



Lumilis Say. 



82 



Physa ancillaria Say. 



82 



elongata Say. 



82 



fragilis Micjli. ^ Ad. 



82 



heterostropha Say. 



82 



Planorbis bicarinatus Say. 



82 



deflectus Say. 



82 



exacutus Gould. 



82 



hirsutus Gould. 



82 



parvus Say. 



82 



trivolvis Say. 



82 



Melania multilineata Say. 



82 



Virginia a S<'y- 



82 



Anculosa carinata Say. 



82 



monodonta Say. 



82 



Paludina decisa Say. 



82 



subcarinata Say. 



82 



Amnicola lapidaria Say. 



82 



decisa JIald. 



82 



porata Say. 



82 



(n. s.) 



82 



(n. s.) 



82 



Valvata pupoidea Gouldi 

 tricarinata Say. 



