372 Miscellanies. 



Unio Nashmllianus. Cumberland River. 

 Blandingianus. St. Johns, Florida. 

 camelus. Ohio River. 

 Gri^thianus. South Carolina. 

 confertus. Santee Canal. 

 They amount to twenty six, in all ; — thus carrying the number 

 of American Uniones to the round number of One Hundred and 

 presenting us with a singular coincidence in American botany, with 

 the genus Carex, where the described species is also about one hun- 

 dred, and where the difficulty of distinction is quite analogous. 



Mr. Lea has also described the following foreign species of Unio: 

 viz. 



Unio Nicklinianus . China. 

 Murchinsonianus. do. 



parallelopi/pedon. River Parana, South America, 

 lacteolus. Rio de la Plata. 

 emarginatus. 

 divaricatus. Egypt. 

 Corrianus. India. 

 Grayanus. China. 

 Burroughianus. River Parana. 

 Paranensis. do. 



We likewise enumerate the species of other genera belonging to 

 the Naiades, brought forward in the present paper. 

 Symphynota globosa. Ohio River. 

 Woodiana. China. 

 magnijica. do. 

 discoidea. do. 



Benedictensis. Lake Champlain. 

 Anodonta Ferussaciana. Ohio River. 

 incerta do. 



Stewartiana.' Bayon Teche. La. 

 plana. Near Louisville. 

 lato-marginata. River Parana. 

 Blainvilliana. Chili. 

 tenebriosa. River Parana, 

 Mortoniana, do. 



Burroughiana. Island Luconia, near Marietta. 

 Margaritana Raveneliana. French Broad and Swananoe Rivers, 

 N. C. 



