8S 



NEW YORK STATE MDSEUM 



Crooked lake Sartwell. 



Onondaga county Beauchamp. 



Keuka lake Wright. 



Schuyler's lake, Otsego county Beecher. 



Cazenovia, Madison county Call. 



Chenango river , Beecher. 



Tioga river, Steuben county Beecher. 



Ontario. 



Ottawa '. Latchford. 



Michigan. 



Diamond lake Hinkley. 



Indiana. 



Flat Rock creek Marsh. 



Illinois. 



Rock river Marsh. 



Virginia. 



Canal, Alexandria Sterki. 



Potomac river State coll. 



South Carolina. 



Camden Simpson. 



Georgia. 



Ogeechee river Simpson. 



Widely distributed in the Eastern and St. Lawrence drainage 

 systems, and reported by Wm. A. Marsh from Rock river, 111., 

 and Flat Rock creek, Ind., localities just within the border of 

 the Mississippi system. 



Unio rectus, Lamarck. 



New York. 



Oneida river Beauchamp. 



Seneca river Beecher. 



Erie canal, Monroe county Walton. 



Tonawanda creek, Niagara county Wright. 



Ontario. 



Ottawa Latchford. 



Lake Erie, Port Dover . . . , Leslie. 



Pennsylvania. 



Allegheny river, Warren county Beecher. 



