U. S. B. F.— Doc. 934. 



FIG. 4.— NORTH FORK OF KENTUCKY RIVER, DOUGHTY SHOALS. 

 Tliis shows the riffles and the pool above. The rifllcs are situated diagonally across the river. 



FIG. 5.— SOUTH FORK OF KENTUCKY RIVER, NEAR BRONNER BEND SHOALS. 

 Some mussels are found here. Bottom rocky, with sand and gravel. 



