110 ILLINOIS BIOLOGICAL MONOGRAPES [208 



EXPLANATION OF PLATE 



Fig. 14. Dam in Salt Fork at Homer Park. The dam is just below the interurban 

 bridge and is five feet high. November 4, 1920. 



Fig. 15. Salt Fork below dam at Homer Park. Shallow water and rocky bottom. No- 

 vember 4, 1920. Part of Station 25. 



