============+===================+==================+=================== | Walnut River, | | Chippewa River, | Kansas | | Wisconsin COUNT OR | _H. n. placita_, | Big Blue River, | _H. n. nuchalis_, PROPORTIONAL| KU 3869 | Kansas KU 3812 | KU 2012 MEASUREMENT +-------+-----+-----+------+-----+-----+-------+-----+----- | A | B | C | A | B | C | A | B | C ------------+-------+-----+-----+------+-----+-----+-------+-----+----- Orbit / | .051 |.0035|.0010| .059 |.0047|.0013| .068 |.0044|.0013 standard |(044- | | |(047- | | |(059- | | length | 61)| | | 71)| | | 77)| | | | | | | | | | | Gape-width /|.066 |.0046|.0013| .064 |.0044|.0013| .056 |.0038|.0011 standard |(055- | | |(055- | | |(046- | | length | 75)| | | 74)| | | 64)| | | | | | | | | | | Orbit / | .776 |.0083|.0024| .907 |.0080|.0023| 1.223 |.0119|.0034 gape-width |(647- | | |(712- | | |(953- | | | 945)| | |1.067)| | | 1.566)| | ------------+-------+-----+-----+------+-----+-----+-------+-----+----- Bailey (1956:333) does not consider the southwestern _Hybognathus placita_ (Girard) specifically distinct from the northeastern _H. nuchalis_, but little evidence of intergradation has been published. In Table 2, I have compared measurements and counts of 50 specimens of _Hybognathus_ from the Big Blue River, 50 _H. n. placita_ from the Walnut River, Kansas (Arkansas River Basin), and 50 _H. n. nuchalis_ from Wisconsin. Measurements and counts were made by methods described by Hubbs and Lagler (1947:8-15) and measurements are expressed as thousandths of standard length. _Hybognathus_ from the Big Blue River tend to have fewer, larger scales than _H. n. placita_ from the Walnut River, Kansas, but more and smaller scales than _H. n. nuchalis_ from Wisconsin. In specimens from the Blue River, the size of the orbit divided by standard length, and the width of gape divided by standard length and width of orbit, are also intermediate between the Walnut River and Wisconsin specimens, but tend toward the former. Specimens from the Big Blue River resemble _H. n. placita_ from the Walnut River in body shape, robustness, and in the embedding of scales on the nape. =Pimephales notatus= (Rafinesque), bluntnose minnow: Meek (1895:136); and Evermann and Cox (1896:399). Stations 2-S, 3-S, 5-G, 6-S, 8-S, 9-G, 10-G, 11-G, 12-G, 13-G, 16-G, 19-G, 27-G, 29-G, 53-S, 54-G, and 58-G.