1892 .j Unionidce of Spoon River. 



received from White river being fully twice as large a 

 found in Illinois. 

 V. fragosm Conrad. 



closely allied to U. lacrymosus Lea 

 • Rafinesque. 



some localities and i 



species. 



U. comutus Barnes. 



A unique species. I know of no locality in Illinois where 

 it can be found in abundance. After a season's searching on 

 the "Spoon" I am not rewarded with over twelve or fifteen, 

 but these present such a variety of coloring of from green to 

 red, and so odd in character with their knob or horn-like pro- 

 jections that each find is welcomed as a prize. 

 U. ebeneus Lea. 



A few found in the Spoon; more common in the Illinois 

 near Pekin. 

 U. elegans Lea. 



This fine shell does not belie its name ; it is truly an elegant 

 Unio; found associated with the next species to which it is 

 related. 

 U. donaciformis Lea. Synonym zigzag Lea. 



Far more common than the elegant. A very handsome 

 pink variety is found in Spoon river. 



U 'l7eTy common mollusc found everywhere on ^e Spoon ; 

 easily dLinguished by its velvety epidermis and the red 

 meat of the animal. 

 U. obliquus Lamarck. 



Rare. 

 17. orbiculatus Hild. 



A few found. A doubtful species. 

 V. parvus Barnes. 



Common above the dam in deep water. 

 U. ellipsis Lea. 



Rare. 



