Table 10.—Present Westernmost Records of Some Fishes in the Arkansas River Basin in Kansas.

Spring River

Cottus carolinae
Dionda nubila
Etheostoma blennioides
Etheostoma gracile
Etheostoma nigrum nigrum
Etheostoma punctulatum
Etheostoma saxatile
Hypentelium nigricans
Moxostoma duquesnii
Notropis spilopterus
Noturus exilis

Neosho River

Cycleptus elongatus
Etheostoma chlorosomum
Etheostoma flabellare lineolatum
Hybopsis amblops
Hybopsis biguttata
Hybopsis x-punctata
Notropis zonatus pilsbryi

Verdigris River

Etheostoma whipplii
Etheostoma zonale arcansanum
Percina copelandi
Moxostoma carinatum
Notropis boops
Notropis volucellus
Noturus miurus

Chikaskia River

Ictalurus natalis
Percina phoxocephala
Labidesthes sicculus
Lepomis megalotis breviceps
Micropterus punctulatus
Moxostoma aureolum pisolabrum
Moxostoma erythrurum
Notropis camurus
Pimephales notatus
Pimephales tenellus
Noturus nocturnus

The westernmost records for seven species are in the area studied.

1. Lepisosteus platostomus.

2. Carpiodes velifer.

3. Moxostoma carinatum.

4. Minytrema melanops. One specimen taken at station G-10 near the mouth of Crab Creek constitutes the present westernmost record. A specimen has been taken by Cross (C-24-51) in the headwaters of the Walnut River.

5. Notropis boops. The westernmost record is station G-5 on Grouse Creek. This fish has been reported slightly west of this in Oklahoma on Big Beaver Creek in Kay County (number 4776, Oklahoma A & M College Museum of Zoology).

6. Notropis volucellus. Two specimens were taken at station G-8 on Silver Creek.

7. Percina copelandi. The westernmost record is from station G-1, two miles above the mouth of Grouse Creek.

The easternmost occurrences of four species are in the area studied. These species are Hybopsis aestivalis tetranemus (Station A-2), Notropis blennius (Station A-1), Notropis girardi (Station A-2), and Fundulus kansae (Station A-2 and Walnut River). These fish are associated with the Arkansas River proper and its sandy western tributaries. In Oklahoma, these fish are found in the Arkansas River as it proceeds eastward and in the downstream portions of some of its tributaries. These fish show little tendency to ascend the streams of the Flint Hills.