398 OHIO STATE ACADEMY OF SCIENCE. 
tPisidium politum Sterki. 
Tuscarawas Co., various places (St.). 
+Pisidium politum decorum Sterki. 
Dover, Cuyahoga Co.! (Allen); Meyer’s Lake, Canton (St.); 
Tuscarawas Co., various places (St.). 
+Pisidium splendidulum Sterki. 
Cuyahoga River at Hiram, Sandusky, various places in 
Tuscarawas Co. (St.); decidedly variable. 
+Pisidium rotundatum Prime. 
Garrettsville! (Streator); Justus, Stark Co. (St.). 
+Pisidium ohioense Sterki. 
Garrettsville! (Streator). 
+Pisidium medianum Sterki. 
Springfield Lake (St.); probably at least over the northern 
part of Ohio. 
yPisidium pauperculum Sterki. 
Springfield Lake (St.). 
Pisidium pauperculum crystalense Sterk:. 
Cuyahoga River, Nimishillen Creek at Canton (St.). 
Norte: All of these Pisidia are widely distributed, out- 
side of Ohio, and most of them will be found over the state. 
