Illustrations xiii 
FIG. PAGE 
60. Fremont's Sqairrel, Sciiirus fremonti . .186 
61. Skulls of Weasels, etc. ..... 191 
62. Black-footed Ferret, Putorius nigripes, skull, 
showing dentition . . . . -193 
63. Western Mink, Lutreola vison energumenos, 
skull, showing dentition . . . .199 
64. Rocky Mountain Marten, Mustela caurina 
origenes, skull, showing dentition . . 202 
65. Badger, Taxidea taxus, skull, showing dentition 206 
66. Badger, Taxidea taxus ..... 207 
67. Northern Plains Skunk, Mephitis hudsonica, 
skull, showing dentition, . . . .210 
68. Long- tailed Texas Skunk, Mephitis mesomelas 
varians . . . . . . .212 
69. Great Basin Spotted Skunk, Spilogale gracilis 
saxatilis, skull, showing dentition . .217 
70. Ring-tail, Bassariscus astutus, skull, showing 
dentition . . . . . . . 221 
71. Grizzly Bear, Ursus horribilis, side view of 
skull ....... 224 
72. Black Bear, Ursus americanus, side view of skull 224 
73. Grizzly Bear, skull, showing dentition . .225 
74. Black Bear, skull, showing dentition . . 233 
75. Scott's Gray Fox, Urocyon cinereo-argenteus 
scotti, dorsal view of skull .... 235 
76. Western Red Fox, Vulpes macrourus, dorsal 
view of skull ...... 237 
