MOLLUSCA OF OHIO. 397 
Pisidium fallax mite Sterk1. 
Nimishillen Creek at Canton (St.). 
{Pisidium punctatum Sterki. 
Portage, Summit, Stark and Tuscarawas Counties, various 
places; Ohio River at Cincinnati; Miami Canal at Ham- 
ilton (all: St.); doubtless all over the state, in running 
water. 
Pisidium variabile Prime. 
Summit, Stark and Tuscarawas Counties (St.). Probably 
all over the state. 
;Pisidium affine Sterki. 
Springfield Lake, Meyer’s Lake (St.). 
7Pisidium sargenti Sterki. 
Portage, Stark and Tuscarawas Counties, various places 
(St.); Cuyahoga Co.! (Allen). 
7Pisidium noveboracense Prime. 
Summit, Stark. Tuscarawas, Erie Counties (St.); Geauga 
Co.! (Streator); Puritas springs, Cuyahoga Co.! not 
typical (Allen). Decidedly variable. 
Pisidium noveboracense elevatum Sterki. 
Sandusky (St.). 
Pisidium noveboracense quadrulum Sterki, and form proclive St. 
Tuscarawas Co., various places (St.). 
{Pisidium succineum Sterki. 
Tuscarawas Co., various places (St.). 
7Pisidium walkeri Sterki. 
Portage, Stark, Tuscarawas Counties (St.); Hamilton Co.! 
(Cincinnati Museum). 
}Pisidium mainense Sterki. 
Navarre, Stark Co. (St.). 
{Pisidium neglectum Sterki. 
Krumroy, Summit Co., Canal Dover, Tuscarawas Co. (St.); 
Dover, Cuyahoga Co.! (Allen). 
tPisidium trapezoideum Sterki. 
Summit, Tuscarawas and Auglaize Counties (St.). 
{Pisidium roperi Sterki. 
Hudson, Summit Co.! (Pettingell). 
{Pisidium streatori Sterki. 
Garrettsville! (Streator); Justus, Stark Co. (St.); Columbus! 
(Moores); Geauga Lake, east of Cleveland! (Allen). 
Pisidium abitum Haldeman. 
Over the state; very variable. Under this name, most of our 
Pisidia, even of widely different groups, are listed and 
in collections. All of them should be revised. 
7Pisidium strengii Sterki. 
Garrettsville (St.); Dover, Cuyahoga Co.! (Allen). 
