NORTH AMERICAN CONCHOLOGY. 



219 



Page. 





Page. 



367 



Pupa armifera Say. 



368 



367 



corticaria Say. 





367 



ovata Say. 



368 





P. modesta. 



368 



367 



Succinea obliqua Say. 





367 



avara Say. 



368 



368 



Bulimus lubricus Brug. 



368 



368 



harpa Pftiffer. 







Helix harpa Say. 



368 



368 



Planorbis armigerus Say. 



368 



368 



bicarinatus Say. 



368 



368 



campanulatus Say. 



368 



368 



corpulentus Say. 



368 



338 



deflectus Say. 



368 



368 



exacutus Say. 



368 



3G8 



parvus Say. 



368 



368 



trivolvis Say. 



368 



368 



Limnea caperata Say. 



368 





L. uinhilicata Adams. 



368 



368 



catasc opium Say. 



368 

 368 





Oedeb ACl 



GPH 



369 



Unio bullatua Rnf. 



1369 



U. pustulosus Lea. 

 369 cardium liaf. 



U. vcjitricosus Barnes. 

 369 cariosus Say. 



369 clava Lam. 



U. ini/tiloides Raf. 

 369 dilatus liaf. 



U. i/il/hosus Barnes. 

 369 fasciolaris Ruf. 



U. ]>/iaseolus Hildretli. 

 inucronatus Barnes. 

 3G9 fasciatua Raf. 



U. crassus Bames. 

 elliptirus Barnes. 

 cnrinatus Barnes. 

 369 luteolua Lam. 



('. al/ii/uoidcus Barnes. 

 i)ij/a/us Barnes. 

 369 metanevrua Raf. 



U. nodosus Bames. 



369 



369 

 369 



369 

 369 



369 



369 



369 

 369 



369 



369 



Limnea columella Say. 

 L. Timcrostoma Say. 



emarginata Say. 



fragilis Linn. 

 L. elodes Say. 



gracilis Say. 



jugularis Say. 



L. stagnalis Kirtland. 



megasoma Say. 



umbrosa Say. 

 Physa heterostropha Say. 



elongata Say. 

 Paludina decisa Say. 



isogona Say. 



subglobosa Say. 

 Amnio o la limosa Say. 



lustrica Saj/. 

 Melania depygis Say. 



elevata Say. 

 Valvata tricarinata Say. 



sine era Say. 



ALA. 



Unio nervosus Raf. 



U. ziy-zay Lea. 



donaciformis Lea. 

 olivariua Raf. 



U. ellipsis Lea. 

 parvus Barnes. 

 prasinua Conrad. 



U. SchooUraflensis Lea. 

 radiatus Tmih. 

 rectus L.din. 



U. prwlongiis Barnes. 

 reflexus Raf 



I/, cornutus Barnes. 

 subrostratus Raf. 



U. iris Lea. 

 trigonus Lea. 

 truncatus Raf. 



U. chgans Lea. 

 tuberculatus R'f. 



U. verrucosus Barnes. 

 undatus Barnes. 



