UNIO. 



B 



g 



c 



I 

 I 



1 



OVAL. 

 *pinguis. 



Australis. Zcm. Phil. 1 Desk. Han, 

 Hyridella Australis. Swain. 



*Hydianus. Lea. Chenu. Adams. Han. 



*approximus. Lea. 



*Aztecorum. Phili. 



*Claibornensis. Lea. Chenu. Han. 



*Powellii. Lea. 



*Reeveianus. Lea. 



*luteolus. Lam. Defray. Han. 



Unio siliquoideus. 2 Bar. Con. Adams. 



Kiist. 



Unio inflatus. Bar. 3 

 Unio melinus. Con. 

 Unio rosaceus. Defray. 

 Lampsilis siliquoidea* Stimp. (Agass. 



MSS.) 



Mya inflata. Eat. 

 Mya siliquoidea. Eat. 



Children!. 5 Gray. 



pulcher. Lea. Chenu. Han. 



OVAL. 



*tener. Lea. Chenu. 



*Prevostianus. Lea. 

 *modioliformis. Lea. Han. 

 *tenerus. Rav. Han. 

 *perpictus. Lea. 



*radiatus. Lam. Bar. Desk. (Ency. 



Ver. T. 2.) Menfre. Gould. Lins- 



ley. Migh. Defray. Kiist. 'Han. 

 Unio Virginiana. Lam. Menke. 

 Unio olliquiradiatus. Reeve. 

 Unio radiatus. 6 Speng. 

 Unio distans. Anth. 

 Mya radiata. Gmel. Wood. Dill. 



Schreib. Eat. 

 Mya oblongata. Wood. 

 Mya pictorum tennis. Chem. 

 Lampsilis radiata. Stimpson. (Agass. 



MSS.) . 



Jordrtnicus. Bourg. Mous. 

 Unio Grelloisianus. Bourg. 



*apicinus. Lea. 



Gontierii. Bourg. 

 *Bruguierianus. Bourg. 



1 Dr. Philippi figures a Unio under the name of Australis, Lam. (Conchylien, Tab. 5, Fig. 5), from 

 New Holland, and says that U. ambiguus, Parreyss, is the young. I did not see Lamarck's AustraliSj 

 when in Paris; it was not in the Museum. 



2 Mr. Say makes siliquoideus the same with viridis, Raf. Ferussac, in his cabinet, makes it the same 

 with fasciata, Raf. Mr. Conrad makes it the same with vittata, Raf. Ferussac, in his "Observations," 

 states the inextricable difficulty resulting from the confusion caused by Mr. Rafinesque. See "Observa- 

 tions," p. 13, in Magazin de Zoologie. 



3 Described from a female luteolus. Lam. 



4 Prof. Agassiz says, in MSS. cited by Mr. Stimpson, that this is not identical with the Ohio River 

 species usually called U. siliquoideus; but I think they are the same. 



6 1 have never seen this species, but presume, from the figure in Griffith's Cuvier, very poor as it 

 evidently is, that it is a distinct species. In the index, Mr. Gray inserts, in brackets (Unio Chhii'iixi*), 

 and says it has small compressed teeth. The figure looks something like a Monocondylcea, D'Orbigny. 



6 Spengler, in Skriv. Nat. Hist., v. 3, cites radiatus from Miiller, and as coming from the East Indies. 

 If from that part of the globe, it cannot belong to this species. 



