110 ILLINOIS BIOLOGICAL MONOGRAPHS [208 
“EXPLANATION OF PLATE 
Fic. 14. Dam in Salt Fork at Homer Park. The dam is just below the interurban 
bridge and is five feet high. November 4, 1920. 
Fic. 15. Salt Fork below damat Homer Park. Shallow water and rocky bottom. No- 
vember 4, 1920. Part of Station 25. 
