The golden redhorse was common in several of the streams surveyed, and utilized the upland parts of streams more extensively than any of the other catostomids occurring in the area. _M. erythrurum_ and _Ictiobus bubalus_ were taken together at only two stations. In no case was _I. bubalus_ taken from a tributary of Grouse Creek or of Big Caney River. In contrast _M. erythrurum_ reached its greatest concentrations in such habitat, although it was always a minor component of the total fish population. Stations C-5 and E-2 were the lowermost environments in which this redhorse was taken. The largest relative number of golden redhorse was found at station G-12 on Crab Creek where 7.5 per cent of the fishes taken were of this species. This station consisted of intermittent pools averaging one foot in depth. Bottoms were bedrock and rubble and the water was clear and shaded. The fish were consistently taken in the deeper, open part of the pool where aquatic vegetation, which covered most of the pool, was absent. Another station at which _M. erythrurum_ was abundant was C-12 on Cedar Creek. Here a long, narrow, clear pool was the habitat, with average depth of 17 inches, and bottom of bedrock. #Minytrema melanops# (Rafinesque): Stations G-10, C-4, C-12, E-1. Occurrences of the spotted sucker were scattered. At stations C-4 and G-10 single specimens were taken. At station E-1 (July 9) one specimen was taken at the mouth of a small tributary where water was turbid and quiet. This specimen (K. U. 3708) was the largest (9-3/8 inches total length) found, and possessed pits of lost tubercles. #Cyprinus carpio# Linnaeus: Stations A-1, W-1, W-2, W-3, W-4, G-3, G-4, G-6, G-8, C-3, C-5, E-4. Carp were taken most often in downstream habitat. No carp were taken above station C-5 on Big Caney River. The earliest date on which young were taken was July 7, when 46 specimens, approximately 1/2 inch in total length, were taken from the Walnut River at station W-1. The small carp showed a preference for small shallow pools; adults were found in deeper pools. #Hybopsis aestivalis tetranemus# (Gilbert): Station A-3. Only one specimen of the speckled chub was taken. The species has been recorded from nearby localities in the Arkansas River and its tributaries both in Kansas and Oklahoma. Its habitat seems to be shallow water over clean, fine sand, and it occurs in strong current in mid-channel in the Arkansas River. Suitable habitat does not occur in other parts of the area covered by this report. #Notropis blennius# (Girard): Stations A-1, A-2, A-3.