T. A. CONRAD. 



51 



Unio niger Rafinesquc. 



— nodulatus Rafinesquc. 



— noxus Say 



— nebulosus Conrad. 



— ovatus Say 



— obesus Lea. 



— olivarius Rafinesquc. 



— ochraceus Say. 



— obliquatus Rafinesquc. 



— oviformis Conrad. 



— penitus Conrad. 



— parvus Barnes. 



— plicatus Say 



— poulsoni Conrad. 



— pileus (7) Lea. 



— perovalis Conrad. 



— purpureus Say 



pcctorosus Conrad. 



planus Barnes. 



personatus Say. . . . 



prasinus Conrad. 



quadrulus Rafinesquc. 



CuneatUS Haines 



( Pustulatus Lea. 



\ Verrucosus Val. 



ArcaBformis Lea. 



. Ovata Rafinesquc. 



. Ellipsis Lea. 



. Sulcatus Lea. 



. Peruvianus Lamarck. 



/Purpurascens Lamarck. 



i Coarctata Lamarck. 



,<Carinifera Lamarck. 



I Complanatus Lea. 



VAurata Rafinesquc. 



Subrotundus Lea. 



^Rugosus Barnes. 



] Lacrymosus Lea. 



rectus Lamarck. . 



rubellus Conrad. 



raveneli Conrad. 



reflexus Rafinesquc. 



radiatus Lamarck. 



ridibundus. . . . Say. 



retusus Rafinesquc. 



stapes Lea. 



stramineus. . . . Conrad. 



subtentus Say. 



stegarius Rafinesquc. 



VÂsperrimus Lea. 



fLatissima Rafinesquc. 



(Praelongus Barnes. 



Cornutus Barnes. 



S Mya radiata Gmelin. 



I Unio Virgiana Lamarck. 



subrotundus 



Rafinesquc. 



— scalenius Rafinesquc. 



— subrostratus. . . . Say. 



— taeniatus Conrad. 



— torsus Rafinesquc. 



Irroratus Lea. 



Pusilla Rafinesquc. 



Striata Rafinesquc. 



' ÎCirculus. . .• Lea. 



\ Orbiculatus.. ...... Hildrelli. 



i Cuneata Rafinesquc 



' i Patulus Lea. 



