41 



140. '' Anodonta'' edentula Say. Common in the 



river; creeks; scarce in the canal. 



141. "' Anodonta" ferussaciana Lea. River and 



canal, scarce. 



No's. 140 and 141 are no true Amodontae, and will be ranged under 

 another genus. 



142. Anodonta grandis Say. Clay pit pools at New 



Philadelphia ; one specimen was 7V2 inches 

 long. 



143. Anodonta salmonea Lea. River and canal, 



common. 



144. Anodonta decora Lea. Little Still-water Creek, 



near Dennison. 



145. Anodonta imbecillis Say. River, creeks, races, 



canal. Most specimens have characteristic 

 undulations in the middle of the valves. In 

 young examples, the glochidium shell is dis- 

 tinctly visible in the center of the umbones. 

 The animal is hormaphroditic ! 



146. Sphaerium simile Say. Few^ places. 



147. Sphaerinm striatinum Lam. Common in the 



river, creeks and races; variable. 



148. Sphaerium stamineum Con. Abundant in the 



same waters with the preceeding. Variable, 

 especially as to striation. 



149. Sphaerium tahale Pr. Nimishillen creek ; not 



yet found in the river. 



150. Sphaerium rhomboideum Say. Ditch from a 



small swamp southeast of New Philadelphia. 



151. Sphaerium occidentale Pr. Rather common in 



pools and ditches, scarce in the river and 

 canal. It has been found in large numbers, 

 living and propagating, in low grounds of the 

 Tuscarawas valley, under wood, dead leaves, 

 etc., where water was standing only during 

 freshets, a few days in a year; a small form 

 with strongly marked lines of growth. 



152. Calycuh'na transversa Say. Common in the 



river rmd canal. 



