BROOK, CREEK, AND RIVER 285 



That portion of the stream where rapid water hurries over 

 stony bottom is the habitat of the darters, the sucker-mouthed 



FIG. 436. Straw-colored minnow, Notropis blennius 



FIG. 437. Rock bass, Ambloplites rupestris, one-half natural size 



FIG. 438. Black crappie, Pomoxis sparoides, one-third natural size 



minnow (Fig. 439), the stone roller, the hammerhead sucker. 

 The rainbow darter, the fantail, black-sided (Fig. 441), sharp- 



