UnionidcB oj Spoon River. 



",01 



A. imbetilis Say. 



Common near the " Big Rocks " a half mile down the river. 

 Not so large as specimens received from other localities, but 

 epidermis a more brilliant green. 

 A. corpulenta Cooper. 

 A. suborbiculata Say. 



Two characteristic and beautiful Anodons, found in a lake 

 near the mouth of Spoon river. The A. mborbmilaia Say, is a 

 fine yellow, waxy looking shell, and does not seem to be in any 

 way related to any other Anodon. 



I also found in this lake a variety of 17. anodontoides but half 

 the size of those found in Spoon river, and differing from it 

 somewhat in shape. 



