_Catostomus commersonnii commersonnii_ (Lacepede). KU 4, 8, 14; UMMZ 1, 5; DM 10, 11, 15, 16, 21, 23, 25, 26, 27, 29, 34, 42. The white sucker occurs primarily in upstream-habitats in the Wakarusa Basin. _Moxostoma aureolum_ (LeSueur). KU 15; DM 1. The northern redhorse was taken only in downstream portions of the basin. Minckley and Cross (1960) regard specimens from the Wakarusa River as intergrades between _M. a. aureolum_ and _M. a. pisolabrum_. _Cyprinus carpio_ Linnaeus. KU 9, 12, 15; DM 1, 2. The carp, though most abundant in downstream situations, probably occurs throughout the drainage and is a potential pest in all impoundments likely to be constructed in the basin. _Notemigonus crysoleucas_ (Mitchill). KU 9; DM 9, 27, 33, 41. The golden shiner was found only in tributaries. _Semotilus atromaculatus_ (Mitchill). KU 2, 3, 5, 6, 7, 8, 10, 12, 13, 14; UMMZ 4, 5; DM 3, 9, 10, 11, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 29, 30, 31, 32, 33. The creek chub was usually abundant in small upland tributaries. _Hybopsis biguttata_ (Kirtland). KU 1, 3; UMMZ 4. The hornyhead chub seemingly was common in early collections but has not been found since 1924. The fish characteristically inhabits clear streams having gravel-bottom. Disappearance of the species from the Wakarusa may have resulted from increased siltation and intermittency of flow. _Hybopsis storeriana_ (Kirtland). KU 10; UMMZ 3. _Hybopsis aestivalis_ (Girard). KU 10; UMMZ 3; DM 1. This species and the preceding one are common in the Kansas River but do not ascend far up the Wakarusa. _Hybopsis gelida_ (Girard) and _Hybopsis gracilis_ (Richardson) occur in the Kansas River and may be expected in the lowermost portion of the mainstream of the Wakarusa. _Notropis percobromus_ (Cope). KU 12; DM 1, 2. The plains shiner shows little tendency to move far upstream from the Kansas River, where it is abundant. _Notropis umbratilis_ (Girard). KU 5, 11, 14; UMMZ 1, 4, 5; DM 9, 10, 11, 16, 17, 18, 21, 22, 23, 24, 25, 26, 29, 32, 33, 34, 35, 37, 38, 39, 41. In our survey the redfin shiner was the most abundant species at several stations, especially at those in the lower and middle portions of tributaries to the mainstream. _Notropis cornutus frontalis_ (Agassiz). KU 1, 2, 3, 8, 11, 14; DM 16. Judging from the numbers preserved in early collections, the common shiner was more abundant and widespread in the 1890's than in 1959. A watershed improvement program effecting more stable flow and decreased turbidity might benefit this shiner. _Notropis lutrensis_ (Baird and Girard). KU 1, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15; UMMZ 1, 2, 3, 4, 5; DM all stations _except_ 5, 11, 12, 13, 14, 19, 35. The red shiner was ubiquitous, and was the dominant species at a majority of stations.