GEOGRAPHICAL DISTRIBUTION OF NEW YORK TJNIONIM 



93 



Ohio. 



Scioto river Walker. 



Delaware Hinkley . 



Michigan . 



Three Mile lake, Oakland county Walker. 



Otter creek, Monroe county Walker . 



Indiana . 



White river Hinkley. 



Illinois . 



Marsh. 



Iowa. 



Muscatine Walker. 



Missouri . 



Marsh . 



Tennessee. 



Duck river Hinkley. 



Arkansas . 



Marsh. 



Occurs in the St. Lawrence and Mississippi drainage systems. 

 In New York it has been reported from the St. Lawrence 

 system only. 



Unio trigonus, Lea. 



New York. 



Near Buffalo Coleman T. Robinson. 



Ontario . 



Toronto, occurs fossil Simpson . 



Ohio. 



Ohio river Walker . 



Indiana. 



Wabash river Walker. 



Illinois. 



Several localities « Hinkley. 



Iowa. 



Muscatine Walker. 



Kansas. 



Marsh. 



