_Notropis stramineus_ (Cope). KU 7, 8, 10, 11, 12, 13, 14, 15; DM 1, 2, 3, 4, 6, 7, 9, 10, 15, 16, 17, 24, 25, 31, 37. The sand shiner was most common in two environments: (1) near the mouth of the Wakarusa where abundance of the species may be attributed to the close proximity of a large population of _N. stramineus_ in the Kansas River, and (2) in upland tributaries that drain areas in which sand is found (especially in Cole Creek). _Notropis topeka_ (Gilbert). KU 1, 14; UMMZ 1, 4, 5; DM 22, 25, 27, 33. Minckley and Cross (1959) describe the habitat of the Topeka shiner as pools of clear upland tributaries with slight flow. We found the Topeka shiner in such habitat in Deer Creek, Strowbridge Creek and Burys Creek. The largest population occurred in a tributary of Strowbridge Creek. This stream probably was intermittent in 1958, and Deer and Burys creeks may have been intermittent at some time in 1957-1959. Although Minckley and Cross (1959:215) have stated that Rock Creek is "unsuitable for this species," we suspect that Rock Creek served as a refugium for _N. topeka_ in time of drought. It was found there (KU 14) in 1952, and again (DM 16) on April 8, 1960. _Notropis buchanani_ Meek. UMMZ 3. Inclusion of the ghost shiner is based on two specimens (UMMZ 63107) collected by C. W. Creaser in 1924. _Phenacobius mirabilis_ (Girard). KU 6, 7, 8, 10, 11, 12, 13, 15; UMMZ 4; DM 3, 6, 16, 18, 21, 22, 34. The suckermouth minnow occurred in several collections but was nowhere dominant. The largest populations were at DM 3, 6, and 22. _Hybognathus nuchalis_ Agassiz. KU 8, 15; UMMZ 3; DM 1, 6. The silvery minnow was taken only in the downstream portion of the Wakarusa and its lower tributaries. _Pimephales promelas_ Rafinesque. KU 6, 7, 8, 9, 10, 11, 13, 14, 15; UMMZ 1, 4, 5; DM all stations _except_ 1, 8, 10, 11, 13, 14, 30. The fathead minnow was ubiquitous, and was dominant at several stations on the smallest creeks. _Pimephales notatus_ (Rafinesque). KU 1, 6, 11, 12, 14, 15; UMMZ 1, 4, 5; DM 6, 8, 10, 12, 16, 17, 18, 24, 25, 26, 37, 41. The bluntnose minnow occurred at several stations on tributaries but was not common. _Campostoma anomalum_ (Rafinesque). KU 7, 8, 10, 11, 12, 13, 14; UMMZ 4, 5; DM 3, 9, 10, 11, 13, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 30, 32, 33, 34. The stoneroller was usually abundant at upstream stations and was found in the mainstream of the Wakarusa River. _Ictalurus punctatus_ (Rafinesque). KU 6, 8, 10, 11, 12, 13, 15; DM 1, 2, 18, 24. Channel catfish were taken by us only in the mainstream; anglers sometimes catch channel catfish in several of the tributaries. _Ictalurus melas_ (Rafinesque). Black bullhead. KU 1, 2, 5, 6, 9, 14; UMMZ 2, 5; DM 5, 6, 7, 16, 17, 21, 25, 26, 31, 32, 33, 38, 39, 40.