Unio. 45 



Dysiioinia A^. 



554 1 gibbosus Raf. Am. bor. 



U. perplexus Lea S. 

 U. obliquus Lani. (Pot. & Mich.) 

 Rotundaria Raf. 



555 l Cc«latus Conrad. — 



556 1 sp. — 



Cpeiiodoiita Scliliiter (Bariosta Raf ? Com- 

 planaria sect. 3 Ag.) 



557 1 plicatus Say. (jun.) ^ — 



Proptera undulosaRaf. teste Val. 

 U. peruviana Lam. 

 Coinplaiiaria Sws. (Alasmodonta Autt.) 



558 1 complanatus Barnes. (Say?) — 



Compl. gigas Sws. 

 Metaptera Raf (PropteraRaf.LymnadiaSws.) 



559 1 megapterus Raf. — 



Symphynota alata Say. Lea. 

 (minor.) — 



latissimus Raf Am. bor. 



U. Poulsoni Conrad. 

 liainpsilis Raf. (Aeglia Sws.) 



ovatus Say. c? — 



ochraceus Say. — 



cariosus Say. — 



U. ovata Val. 



U. ventricosus Barnes. cfr. 



virginianus Lam. 

 Mya anatina Meush. Mus. 



Gronov. p. 93. 

 Mya radiata ^ Gm. (List. 132. 7.) 

 U. radiala Lam. 



