GEOGRAPHICAL DISTRIBUTION OF NBW YORK U^IONIDJE 



69 



Michigan. 



Lenawee county Beecher. 



Saginaw river Walker. 



Houghton lake Hinkley. 



Lake Michigan Marsh . 



Wisconsin. 



Lake Michigan Marsh . 



Apparently confined to the St. Lawrence drainage system. 



Anodonta fragilis, Lamarck. 



New York. 



Plattsburg, Clinton county Walker. 



Loon lake, Franklin county Walker. 



Wilmont, Herkimer county Call. 



Richfield Springs, Otsego county Call. 



Little lakes, Otsego county Call . 



Beaver lake, Onondaga county Beauchamp. 



Seneca lake Wright . 



Cayuga lake State Col . 



Keuka lake Wright. 



Ontario . 



Ottawa Latchford. 



Ohio. 



Hudson Walker. 



Michigan . 



Otsego lake, Otsego county Beecher. 



Lenawee county Beecher. 



Generally distributed Walker. 



Occurs in the Eastern and St. Lawrence drainage systems. It 

 is widely distributed in the St. Lawrence system, but in the East- 

 ern system it has been reported only from the immediate neigh- 

 borhood of the boundary between the Eastern and St. Lawrence 

 systems in Central New York, i. e. Wilmont, Richfield Springs, 

 Little lakes and Otsego lakes. 



Unio gibbosus, Barnes. 



New York. 



Lake Keuka Marsh. 



Pittsford, Monroe county Crump. 



Tonawanda creek, Niagara county Wright. 



Niagara river Beauchamp. 



Chautauqua lake Beecher. 



