No. 112.] 33 



2 Unio kadiatus, Lam. Dekay's New- York Fauna, Part V, pa. 189. 



pi. 18, f. 236. 



U. id Barnes. U. vikginiana, Lea. 



U. id Gould. U. id Dekay. 



U. viRGiNiANA, Lamarck. 



Mya radiata, Gmel. Wood. 



One specimen from Genesee river; one from Crooked lake; and one from 

 the Potomac, near Mt. Vernon, where the shore abounds with this 

 species. 



3 Unio novi-eboraci, Lea. Dekay's New- York Fauna, Part V, pa. 



194, pi. 20, f. 240. 



Several varieties; some well marked, but others approaching the U. 

 iris; plenty in Genesee river above the rapids at Rochester. 



4 Unio iris, Lea. 



Six varieties well marked; and six approaching the U. novi-eboraci, 

 with which it is found. Mr. Lea has said that the two may prove, on 

 full examination, to be only one species. 



5 Unio rubiginosus, Lea. (Not described by Dekay.) 

 U. FLAVus, Conrad. 



^ Four varieties found in the Erie canal at Rochester, and not before 

 credited to this State. It is found in Ohio, and has probably found 

 its way from Lake Erie along the canal ; for some animals have passed 

 from Lake Erie, to the Mohawk and Hudson. The nacre is white, 

 reddish, or yellow; but the body of the clam is a fine yellow, an un- 

 common color here. 



(Not described by Dekay.) 



6 Unio gracilis, 



Barnes. 



U. id 



Lea. 



U. id 



Hildreth. 



U. id 



Adams. 



U. PLANUS, 



Barnes. 



U. FRAGILIS, 



Swainson, 



Two varieties, from Genesee river, on the level of Lake Ontario; not 

 before credited to the State. The shell is often delicate, four inches in 

 breadth and three in height; and the younger shells very fragile : shell 

 much stronger in Ohio. 



7 Unio luteolus, Lam. Dekay's New-York Fauna, Part V, pa. 190, 



pi. 20, f. 241. . ^- 



U. siLiQTJOinENs, Barneis ; podlike, and male. 



U. id ' Conrad. • • ' ' 



\. ■• - 



U. id Adams. 



U. iNFLATUs, Barnes. Well named, and female. 



[Senate No. 112.] 3 



