42 



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OVAL 



capax. 1 Green. Con. K'ust. 

 Sym. globosa. Lea. 

 Unio ventricosus. Reeve. 



*splendidus. Lea. Han. 



*ochraceus. Say. Con. Gould. Lins- 

 ley. DeJcay. Migh. Potier. Han. 

 Sym. ochracea. Lea. 

 Unio rosaceus. Con. 

 Lampsilis ochracea. Stimpson. (Agass. 



MSS.) 

 Mya ochracea. Eat. 



*delicatus. Lea. 



stagnalis. Con. 

 Unio Ogeecheensis. Con. 



*Clarkianus. Lea. 



*crocatus. Lea. Chenu. 



*Cambodiensis. Lea. 



*affinis. Lea. 



Mauritianus. Lea. 



*cariosus. Say. Bar. Gould. Linsley. 

 Dehay. Potier. Sh. & Eat. Han. 

 Unio cariosa? Lam. 

 Unio ovata. Valen. 

 Unio luteola. Con.; not of Lam. 

 Unio oratus. Con. 

 Lampsilis cariosa. Stimpson. (Agass. 



MSS.) 

 Mya cariosa. Eat. 



f OVAL. 



*Spillmanii. Lea. 



*fascinans. Lea. 



*vivescens. Lea. 

 I 



*Georgianus. Lea. Chenu. 



perovatus. Con. Han. 

 *altilis. Con. Han. 



callosus. Lea. 



*multiradiatus. Lea. Desh. Chenu. 

 Han. 

 Unio fascia la ? Paf. 

 Unio fasciolus. Con. Kust. 

 Unio ligamentina. Desh. 



*doliaris. Lea. 



saxeus. Con. 



perovalis. Con. Han. 



*capsa3formis. Lea. Con. Han. 



*deviatus. Anthony. 



*turdigulus. Lea. 



*Florentinus. Lea. 

 Unio saccidus. Anth. 



*Greenii. 3 Han. Con. 



*simplex. Lea. 



1 Mr. Say considers capax as a variety of cardium, Raf., of ventricosus, Bar., of occidens, Lea, and 

 subovatus, Lea, while Mr. Conrad considers it as occidens, Lea. Capax is a perfectly distinct species, 

 and I bad considered it so for some years before either Dr. Green or I described it. He preceded me a 

 short time, of -which I was not aware, as it was published in an unusual periodical for such matter. 



3 U. cariosa, Lam. (Var. 2), is the Alas, marginata, Say. 



8 The description and figure in Mr. Conrad's Monograph differ from those in his New Fr. Wat. Shells. 



