KORTH AMERICAN CONCHOLOGY. 



231 



Page 





13 



"Unio pliciferus Lea. 



13 



subtentus Say. 



13 



Conradicus Lea. 



14 



acutissimus Lea. 





(b. Nodulous.) 



14 



lachrymosus Lea. 



14 



asperrimus Lea. 





U. quadrulus Say. 



14 



fragrosus Conrad. 



15 



Phillipsii Conrad. 



15 



pustulatus Lea. 



15 



Schoolcraftensis Lea. 





U. prasintis Conrad. 



15 



apiculatus Sai/. 



15 



asper Lea. 



15 



stapes Lea. 



15 



metanever Lea. 





U. meianevra Raf. 





nodosus Barnes. 





rugosus Barnes. 





meianei-rus Conrad. 



15 



cornutus Barnes. 





U. rrflexa? Raf. 





rejlexus Conrad. 



15 



pustulosua Leu. 





U. fc/TucosMsBar.jVar. b 





verrucosa Valen. 





verrucosus alius Say. 



16 



turgidus Lea. 





U. Morton i Conrad. 



IG 



Cooperianus Lua. 



IG 



verrucosus Barnes. 





U. tubcrculata? Raf. 





tuberculosa Valen. 





verrucosus purpureus 





mid 





iuherculatus Conrad. 



IG 



noduloBus Lea. 





Mija nodulosa Wood. 



IG 



irroratus Lea. 





U. verrucosus alius Ilild. 



IG 



dromas L.ea. 



17 



.ffisopua Green. 





if. cicatricosus Conrad. 





varicosus Conrad. 



17 



Unio varicosus Lea. 





U. cicatricosus? Say 



17 



perplexus Lea. 





U. gihhosus? Raf. 





gihhosus Conrad. 



17 



tuberculatus Barnes. 



17 



cylindricus Say. 





U. naviformis Lam. 





(c. S2>inou^.) 



17 



spinosus Lea. 





(d. Smooth.) 



18 



arcaeformis Lea. 





U. nexus Say. 



18 



triangularis Barnes. 





U. formosus Lea. 





cuneatus Swain. 



18 



elegans Lea. 



18 



donaciformis Lea. 



18 



zigzag Lea. 



18 



heterodon Lea. 



19 



penitus Conrad. 



19 



securis Lea. 





U. dcprcssa Raf. 



19 



camelus Zea. 



19 



ovatus Say. 





U. ventricosus Desh. 





suhovatus Desli. 





occidens Desli. 



19 



subovatus L^ca. 



19 



crassidens Lam. 





U. cuneatus Barnes. 





niger? Raf. 





niger Conrad. 



19 



carbonariua Lea. 



20 



gibber Lea. 



20 



pumilis Lea. 



20 



rubiginosus Lea. 



20 



Barnesianus Lea. 



20 



pileus Lea. 



20 



So-werbianus Lea. 



20 



Bolidus Lea. 



20 



obliqua Lam. 





U. undutus Barnes. 





trigonus Say. 



