^lichigan (Jeologioal and 

 Biological Survey. 



I'ublication 4 : Biology 2. 

 Plate XI. 



(Al LOOKING INTO THE OX-BOW POND OFF THE PIGEON RIVER AT CASEVILLE. 



*#«*■■■■•;• 





(Bl DEAD-WATERS OF THE PKJEON RIVER AB(»VE CASEVILLE. 



