394 OHIO STATE ACADEMY OF SCIENCE. 



Hemilastena ambigua (Say, Alasmodonta), U. hildrethianus Lea. 



Ohio drainage; Lake Erie (St.). 

 Strophitus edentulus (Lea, Anodonta). 



Over the state, common and very variable. A very small, 

 slight form, much inflated, in Lake Erie, seems to 

 represent a variety. 

 Strophitus edentulus pavonius Lea. 



Over the state; very small e. g. in a run in Portage Co. 

 (St.-t. Simpson) ; very large in the Mahoning River, at 

 Alliance (St.) ; Tuscarawas River, with the common 

 form of edentulus, and merging into it (St.). 

 Anodontoides ferussacianus (Lea, Anodonta). 



Over^the state. 

 Anodontoides ferussacianus subcylindraceus Lea. 



Pymatuning River in Ashtabula County, Grand River, Sil- 

 ver Creek in Portage Co. ; Olentangy River at Delaware 

 (Walker); Burton City, Wayne Co. (St.). 

 Anodontoides ferussacianus modestus Lea. 



St. Lawrence drainage, Lake Erie. 

 Anodonta grandis Say. 



Over the state, very variable. 

 Anodonta grandis plana Lea. 



Scioto River, Columbus; Miami Canal; Ohio Canal at Canal 

 Winchester (Walker); Sandusky River (St.). 

 Anodonta grandis decora Lea. 



Mahoning River; Silas Creek, Portage Co.; Columbus; Little 

 Miami River; Miami Canal; Little Stillwater Creek 

 near Denison (St.). 

 Anodonta grandis salmonia Lea. 



Tuscarawas River and Ohio Canal (St.) ; Upper Cuyahoga 

 River, at Hiram (Streator, St.) ; Pymatuning River, 

 Ashtabula Co. (Walker) ; Silver Lake, Clark Co. ; 

 Olentangy River (Walker). 

 Anodonta grandis benedictensis Lea. 



St. Lawrence drainage; Rocky River (Allen) ; Lake Erie (St.). 

 Anodonta grandis footiana Lea. 



St. Lawrence drainage; Springfield Lake, Summit Co. (St.); 

 cited from Cincinnati. 



For citing localities for these varieties, and identify- 

 ing specimens, I am largely indebted to Mr. Bryant 

 Walker. 

 Anodonta marginata Say. X 



St. Lawrence drainage; Hudson, Summit Co. 



