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useful in predicting political effects of water <br />transfer plans. <br />31. Beckman, W. C. 1974. Guide to the fishes of KEY <br />Colorado. Colorado Cooperative Fishery DESCRIPTION <br />Research Unit, Colorado Fish and Game, DISTRIBUTION <br />Denver. 110 pp. LIFE HISTORY <br />FISH <br />A dicotomous key of the Colorado fishes down to <br />species. Descriptions of species include line <br />drawings illustrating distinctive features and <br />general geographic distribution. A glossary of <br />anatomical and technical terms is included in <br />the appendix. Life histories are brief and <br />limited. Intended as a general introductory <br />guide. <br />32. Behnke, R. J. NociDate. Problems of coexistence ENDANG. FISH <br />between energy development and the native HISTORY <br />fish fauna of the upper Colorado River DTSTRIBUTION <br />basin with a special reference to endangered ECOLOGY <br />and threatened species. Department of DEVELOPMENT <br />Fishery and Wildlife Biology, Colorado COLORADO R. <br />State University, Fort Collins. 6 pp. 1, 2, 3, 4 <br />(mimeo) <br />To understand the basic reasons for the endan- <br />gered and threatened status of some of the <br />fishes native to the Colorado River basin, it <br />is helpful to have some concept of the geologic <br />history of the basin and the long evolutionary <br />history of the species specializing and adapting <br />to an environment which essentially no longer <br />exists. That is, the evolutionary programming <br />resulting in such unusual species as the <br />squawfish, the razorback sucker, the bonytail, <br />and humpback chubs has dictated life histories <br />and ecologies discordant with present conditions. <br />This paper discusses these problems of coexistence. <br />33. Behnke, R. J. 1960. Taxonomy of the cutthroat TAXONOMY <br />trout of the Great Basin with notes on the DESCRIPTION <br />rainbow series. M. A. thesis, University DISTRIBUTION <br />of California, Berkeley. 98 pp. ENDANG. FISH <br />5 <br />This paper deals with the taxonomy of the <br />cutthroat trout. Trout from the Great Basin, <br />Lahontan system, the Bonneville system, the <br />23 <br />