42 



UKIO. 



o ■ 



OVAL. 



*capax. 



Green. Con. Kilst. 

 Sym. glohosa. Lea. 

 Unio ventricosus. Reeve. 



*splendidus. Lea. Han. 



■^ocliraceus. Say. Con. Gould. Lins- 

 ley. Delcay. Migh. Potier. Han. 



Sym. ochracea. Lea. 



Unio rosaceus. Con. 



Lamjosilis ochracea. Stimpson. (Agass. 

 MSS.) 



Mya ochracea. Eat. 



*delicatus. Lea. 



stagnalis. Con. 

 Unio Ogeecheensis. Con. 



*Clarkianus. Lea. 



*crocatus. Lea. Chenu. 



^Cambodiensis. Lea. 



*af&nis. 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. 



OVAL. 



^Spillnianii. Lea. 



*fascinaiis. Lea. 



*viYescens. Lea. 



^Georgianus. Lea. Chenu. 



perovatus. Con. Han. 

 ^altilis. Con. Han. 



callosus. Lea. 



*miiltiradiatus. Lea. Desh. Chenu. 

 Han. 

 Unio fascio la ? Paf. 

 Unio fasciolus. Con. Kilst. 

 Unio ligamentina. Desh. 



*doliaris. Lea. 



saxeus. Con. 



perovalis. Con. Han. 



*caps£eforinis. Lea. Con. Han. 



*deviatas. Anthony. 



"turdigulus. Lea. 



■*Florentinus. Lea. 

 Unio sacculus. Anth, 



*Greeiiii.^ Han. Con. 



^■simplex. Lea. 



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

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

 and I liad 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. 



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



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



