OF CONCHOLOGY. 



29 



U. ellipsis, Lea. 



" elegans, " 



" ebenus, " 



" securis, " 



" spatulatus, " 



" donaciformis, " 



" iris, " 



" zig-zag, " 



" anodontoides, " 



" tenuissimus, " 



*' trigonus, " 



" tuberculatus, " 



" Dorfeuillianus, " 



" occidens, " 



" coccineus, " 



" rubiginosus, " 



" solidus, " 



" asperrimus, " 



" laevissimus, " 



" Cooperianus, " 



" inflatus, " 



" neglectus, " 



" monodontus, Say. 



" alatus, " 



" undulatus, Barnes. 



" gibbosus, " 



" ligamentinus, Lam. 



" gracilis, Barnes. 



U. cornutus, Barnes. 

 " triangularis, " 

 " parvus, " 



" fragosus, Conrad. 

 " luteolus. Lam. 

 " crassidens, Lam. 

 " rectus, " 



" capax, Green. 

 " metanever, Baf. 

 " orbiculatus, Ilild. 

 " ^sopus, Green. 

 " plicatus, Leseur. 



MARGARITA.NA, Schum. 



M. confragosa, Lea. 

 " complanata, " 

 " rugosa, *' 



" marginata, " 

 " deltoidea, " 



ANODONTA, Lara. 



A. corpulenta. Cooper. 



" grandis. Say. 



" ovata, Lea. 



" subcarinata;, Currier. 



" suborbiculata. Say. 



" imbecillis, " 



" edentula, Lea. 



