NORTH AMERICAN CONCITOLOGY. 



247 



No. 



60 Unio verrucosus Barnes. 



U. tuberculata Raf. 

 graniferus Lea. 



61 Alasmodonta calceola Lea. 



A. deltoidea Lea. 



62 complanata Barnes. 



63 rugosa Barnes. 



A. costata Raf. 



64 truncata Say. 



65 Anodonta edentula Say. 



A. areolata Swainson. 



66 Ferussaciana Lea. 



67 imbecilis Say. 



A. incerta Lea. 



68 pavonia Lea. 



A. Wardiana (rare) Lea. 



69 plana Lea. 



A. decora (young) Lea. 

 fjrandis Say. 

 Ancylus rivularis Say. 



1 Helix albolabris Say. 



2 alternata Say. 



3 appressa (rare) Say. 



4 arborea Say. 



5 chersina (rare) Say. 



6 clausa Say. 



7 concava Say. 



8 diodonta (rare) Say. 



9 elevata Say. 



10 electrina Gould. 



11 fallax Say. 



12 fraterna Say. 



13 fuliginosis (rare) Griffith. 



14 glaphyra (rare) Say. 



15 hirsuta Say. 



16 indentata *Soy. 



17 inflecta Say. 



18 inornata Say. 



19 intertexta (rare). 



20 interna Say. 



21 labyrinthica Say. 



