Noturus flavus frequented riffles and swift currents along sandbars in the Big Blue and Little Blue rivers. Cross (1954:311) reported that "the shale-strewn riffles of the South Fork [of the Cottonwood River, Kansas] provide ideal habitat for the stonecat." In my study-area, this species was found not only on rubble-bottomed riffles, but occurred along both stationary and shifting sandbars where no cover was apparent.
Pylodictis olivaris (Rafinesque), flathead catfish: Canfield and Wiebe (1931:7) as "yellow catfish." Stations 3-S, 4-S, 6-S, 8-S, 15-S, 25-S, 38-S, 41-S, 43-S, 44-S, 53-S, and 56-S.
Flathead catfish were found only in the larger rivers. The species was taken rarely by seine, but was readily obtained by electric shocker. Data on the age and growth and food-habits of this species are to be the subject of another paper.
Anguilla bostoniensis (LeSueur), American eel: Jennings (1942:365).
American eels are now rare in Kansas, and none was taken in my survey. The specimen reported by Jennings (loc. cit.) is at Kansas State College (KSC 2916), and was taken by I. D. Graham from the Big Blue River, Riley County, 1885.
Fundulus kansae Garman, plains killifish. Station 42-S.
The plains killifish was collected by me only at Station 42-S. Specimens were collected from my Station 4-S by the Kansas State College class in fisheries management in 1954 (KSC 4985). My specimens were 11 to 13 mm. in total length.
Roccus chrysops (Rafinesque), white bass. Station 3-S.
That the white bass is indigenous to Kansas is evidenced by records of Graham (1885:77) and Cragin (1885:111); however, since that time, and prior to the introduction of this species into reservoirs in the State, R. chrysops has rarely been recorded in Kansas. I collected young white bass at Station 3-S in both 1957 and 1958, and I collected them also in an oxbow of the Kansas River four miles west of Manhattan, Riley County, Kansas, in the mouth of McDowell's Creek, Riley County, and in Deep Creek, Wabaunsee County, and I saw other specimens from an oxbow of the Kansas River on the Fort Riley Military Reservation, Riley County, Kansas. The apparent increase in abundance of white bass in the Kansas River Basin must be attributable to introductions in reservoirs, with subsequent escape and establishment in the streams.
Micropterus salmoides salmoides (Lacépède), largemouth bass. Stations 6-S, 11-G, 43-S, and 45-M.