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. 
St. Lawrence drainage; Hudson, Summit Co. 
