396 OHIO STATE ACADEMY OF SCIENCE. 



Musculium partumeium (Say, Cyclas), Sphcerium, Calyculina 

 part. 

 Over the state, in quiet waters; variable. 



A form: more rounded in outlines, more regularly 

 inflated, with broad, low beaks, smaller than typical par- 

 tumeia, seems to represent a variety. Garrettsville ! (Stre- 

 ator) ; New Philadelphia (St.); a simliar form from Mentor 

 (Allen). 

 fMusculium jayense (Prime, Cyclas), Sphcsrium jayanum Prime, 

 Mon. Corb. 

 Cincinnati; probably over western Ohio. 

 fMusculium truncatum (Linsley, Cyclas), Sphcerium, Caly- 

 culina tr. 

 Portage Co. (Streator, St.) ; Geauga and Cuyahoga Counties! 

 (Allen) ; Stark and Tuscarawas Counties (St.) ; probably 

 all over the state. 

 Musculium securis (Prime, Cyclas), Sphcerium, Calyculina securis. 

 Over the state, common in ponds, pools, ditches, variable. 

 Seyeral forms seen are considerably different and may 

 represent varieties or even distinct species. 

 Musculium sphcericum (Anthony, Cyclas), described from 

 the Black River, Lorain Co., is beliveed to be a form of 

 securis; I have seen no authentic specimens. 

 fMusculium sp. - - X 



Geauga Lake, east of Cleveland (Allen). [Quite distinct from 

 all other species, and probably underscribed ; the same 

 has been seen from Michigan, Indiana and Illinois]. 

 Pisidium virginicum (Gmelin, Tellina, Cyclas dubia Say. 



Cuyahoga River and Breakneck Creek, Portage Co., Nimi- 

 shillen Creek, Stark Co.; Auglaize River (all: St.); 

 Cincinnati. 

 Pisidium compressum Prime. (The "river form," regarded 

 as typical ) . 

 Over the state, common in rivers and creeks, rarely in 

 springs. 

 Pisidium compressum laevigatum Sterki. 



Springfield Lake, Meyer's Lake (St.); in quiet waters. 

 Pisidum compressum opacum Sterki. 



Sloughs on the Tuscarawas River (St.). 

 f Pisidium kirklandi Sterki. X 



Auglaize River at Wapakoneta (St.). 

 f Pisidium cruciatum Sterki. X 



Tuscarawas River, Miami Canal at Hamilton (St.). 

 f Pisidium fallax Sterki. 



Rivers, creeks and races in Portage, Summit, Stark and 

 Tuscarawas Counties; Miami Canal at Hamilton; San- 

 dusky and Maumee Rivers (all: St.). 



