FIG. 54. _Lepus californicus deserticola_, 4 mi. W Fallon, Churchill County, Nevada. No. 900061 MVZ, ♂. [Illustration: FIGS. 55-57. Ventral views of skulls of hares. All × 1. Different views of these skulls are shown in figs. 49-51.] FIG. 55. _Lepus americanus tahoensis_. FIG. 56. _Lepus alleni alleni_. FIG. 57. _Lepus arcticus groenlandicus_. [Illustration: FIGS. 58-60. Ventral views of skulls of hares. All × 1. Different views of these skulls are shown in figs. 49-51.] FIG. 58. _Lepus townsendii townsendii_. FIG. 59. _Lepus callotis_. FIG. 60. _Lepus californicus deserticola_. [Illustration: FIGS. 61-64. Lateral views of skulls (one lower jaw) of hares. All × 1. Different views of these skulls are shown in figs. 49-51.] FIG. 61. _Lepus alleni alleni_. FIG. 62. _Lepus americanus tahoensis_. FIGS. 63-64. _Lepus arcticus groenlandicus_. [Illustration: FIGS. 65-68. Lateral views of skulls (one lower jaw) of hares. All × 1. Different views of these skulls are shown in figs. 52-54.] FIG. 65. _Lepus townsendii townsendii_. FIG. 66. _Lepus callotis_. FIGS. 67-68. _Lepus californicus deserticola_. LITERATURE CITED ALLEN, J. A. 1910. Additional mammals from Nicaragua. Bull. Amer. Mus. Nat. Hist., 28:87-115, April 30. ANDERSON, R. M. 1947. Catalogue of Canadian Recent mammals. Bull. Nat. Mus. Canada, 102:v + 238, January 24. ANDERSON, R. M., and RAND, A. L. 1943. A synopsis of the rodents of the southern parts of the Prairie Provinces of Canada. Special contribution-43-1, Canada, Dept. Mines and Resources, Mines and Geol. Branch, pp. 1-25, 13 illustrations (mimeographed MS). On the front of the self cover below the date 1943 there is stamped "April 27, 1939". BAILEY, A. M., and HENDEE, R. W. 1926. Notes on the mammals of northwestern Alaska. Jour. Mamm., 7:9-28, 3 pls., February 15. BAILEY, V. 1927. A biological survey of North Dakota. N. Amer. Fauna, 49:vi + 226, 21 pls., 8 figs. in text, January 8. 1932. Mammals of New Mexico. N. Amer. Fauna, 53:1-412, 22 pls., 56 figs. in text, March 1. 1936. The mammals and life zones of Oregon. N. Amer. Fauna, 55:1-416, 51 pls. (nos. 2-52), 102 figs. in text, 1 map, August 29. BARNES, C. T. 1927. Utah mammals. Bull. Univ. of Utah, 17(12):1-183, Frontispiece, 31 maps, June. BLACK, J. D. 1936. Mammals of northwestern Arkansas. Jour. Mamm., 17:29-35, February 17. BLAIR, W. F. 1936. The Florida Marsh rabbit. Jour. Mamm., 17:197-207, August 17. 1938. A new race of the eastern cottontail from the Texas Panhandle. Occas. Papers, Mus. Zool., Univ. Michigan, no. 380:1-3, June 21. 1939. Faunal relationships and geographic distribution of mammals in Oklahoma. Amer. Midl. Natur., 22:85-133, 1 fig., July.