BY STEPHEN D. DURRANT, M. RAYMOND LEE, AND RICHARD M. HANSEN University of Kansas Lawrence 1955 BY STEPHEN D. DURRANT, M. RAYMOND LEE, AND RICHARD M. HANSEN The Museum of Zoology, University of Utah, contains approximately 5000 specimens in addition to those available to Durrant (1952) when he prepared his account of the "Mammals of Utah, Taxonomy and Distribution ." Study of this material discloses two kinds of mammals not heretofore known to occur in Utah, and extends the known limits of occur

Davis, W. B. 1939. The Recent Mammals of Idaho. The Caxton Printers, Ltd., Caldwell, Idaho, 400 pp., 2 full-page half tones, 33 figs. in text, April 5. Durrant, S. D. 1952. Mammals of Utah, taxonomy and distribution . Univ. Kansas Publ., Mus. Nat. Hist., 6:1-549, 91 figs. in text, 30 tables, August 10. Fautin, R. W. 1946. Biotic communities of the northern desert shrub biome in Western Utah. Ecol. Monogr., 16:251-310, 19 figs. in text, 33 tables, October. Hall, E. R. 1941. New heteromyid rodents