18 Twenty-Second Annual Repoet on State Cabinet. 



TJnio eadiatus, Lam. De Kay, p. 189. Yery abundant. 



Unio peessus, Lea. De Kay, p. 191. Yery rare. One specimen 

 found in the Northern canal. It is said to be plentiful in Hoosic 

 River, farther north. 



MARGARITANA, Lea. 



Maegaeitana etjgosa, Lea. De Kay, p. 196. Moderately abundant 

 in the canals, rare in the Mohawk basin, and not yet found in the 

 Hudson River. 



Maegaeitana undulata, Lea. De Kay, p. 198. Common in the 

 Northern canal near Waterford ; not yet found in the Hudson 

 River. 



Maegaeitana maeginata? Say. De Kay, 196. Rare. Northern 

 canal. 



ANODONTA, Brugtjiere. 



Anodonta emplicata, Say. De Kay, p. 202. Yery large and pon- 

 derous specimens found in the basin, rarer in the canals, and seldom 

 found in the Hudson River. 



Anodonta elttviatilis, Lea. De Kay, p. 203. Moderately abund- 

 ant in the canals and river. 



Anodonta lewisii, Lea. Proc. Acad. Nat. Sci. Phila., 1857, p. 84. 

 Mohawk basin. Not common. 



Anodonta benedictensis, Lea. De Kay, p. 204. Common in the 

 Hudson River and Mohawk basin. 



Anodonta edentula, Say. De Kay, p. 201. Not common. North- 

 ern canal. 



SPIL3BRIUM, Scopoli. 



Spkmkium sulcatum, Lam. De Kay, p. 222. Described by De Kay 

 as Cyelas similis. Found of very large size in the Mohawk 

 basin, on a sand bank, at low water ; not common in the Hudson 

 River or canals. 



Sphjseium steiatlnum, Lam. De Kay, p. 223. Mohawk River and 

 canals. Common. De Kay describes this shell under the name of 

 Cyelas dubia f Say. 



Sphjeeium secueis, Prime. Mohawk basin. Rare. 



