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are of undetermined significance relative to populations <br />represented. The Little Colorado and Black Rocks/Westwater <br />populations are thought to be the largest based on surveys. <br />Cope, E.D., and H.C. Yarrow. 1875. Report upon the collections <br />of fishes made in portions of Nevada, Utah, California, <br />- Colorado, New Mexico and Arizona, during the years 1871, <br />1872, 1873 and 1874. Geol. & Geogr. Explor. & Surv. of <br />100th Mer. Vol. 5(6):635-703. <br />Provides several early records of historical occurrence, <br />including G. elegans in the San Juan River, G. robusta from <br />several Gila River system localities in Arizona and New <br />Mexico (Zuni locality is probably in error, see Baird and <br />Girard, 1853a, in Taxonomic References), and G. intermedia <br />(as nigra) from Ash and San Carlos creeks, Arizona. <br />Evermann, B.W., and C. Rudder. 1895. The fishes of the Colorado <br />River. Bull. U.S. Fish. Comm. 14 (1894):473-486. <br />Summarizes works done on Colorado River basin fishes prior <br />to 1894 and tabulates occurrence of species. Contains <br />several documentations of G. elegans from the lower <br />Colorado-Gila rivers area, the San Juan, Colorado River in <br />Colorado, and the Green and Gunnison rivers. Also documents <br />former occurrence of G. robusta in lower Colorado in <br />Arizona, several Gila system localities, the Uncompahgre and <br />Gunnison rivers Colorado and the Green River, Utah and <br />Wyoming. <br />Fowler, H.W. 1925. Notes on North American cyprinoid fishes. <br />Proc. Acad. Nat. Sci. Phila. 76 (1924):389-416. <br />Contains two interesting historic records of G. elegans <br />based on specimens (now in Acad. Nat. Sci. Phila.) from the <br />Green River in Wyoming and "Hardy River, Lower <br />California"(?). Discusses specimens diagnosed as intermedia <br />from Rio San Francisco, Apache and Duck creeks in the Gila <br />system. <br />Holden, P.B. 1980. Gila elegans; p. 167, in: D.S. Lee et al., <br />Atlas of North American Freshwater Fishes. Nor. Car. St. <br />Mus., Raleigh, -U.S. Fish & Wldlf. Serv. 854 p. <br />Provides a range map of historic and recent (since 1973) <br />records for bonytail collected prior to 1980. <br />Holden, P.B., and C.B. Stalnaker. 1975a Distribution and <br />abundance of mainstream fishes of the middle and upper <br />Colorado River basins, 1967-1973. Trans. Amer. Fish. Soc. <br />26