STREAM ANIMALS 



121 



TABLE XXIII 



ANIMALS or THE DESPLAINES, CHICAGO, AND DuPAGE RIVERS 

 The meaning of the letters in the column headed "Location" is as follows: 

 L=Libertyville (still-silt); W= Wheeling (mud-gravel); D = DuPage; R = Riverside 

 (swift-stones). Libertyville is the farthest upstream, and the other situations follow 

 in the order named. C = Chicago River at Edgebrook, which is added without 

 regard to longitudinal order. 



