Xn LIST OF ILLUSTKATIONa. 



Page. 

 Fig. 11. — Odocoileus couesi. Metatarsal gland 176 



12.— Skulls of Odocoileus. Viewed in profile from behind, a, O. couesi; 



h, O. americanus; c, 0. crooki; d, O. hemionus canus 178 



13.— Odocoileus couesi. a. Skull, lateral view; 6, auditory bulla 179 



14. — Odocoileus couesi. Antlers of adult ' 180 



15. — Odocoileus couesi. Teeth of adult females, a, Incisor-canine series 

 viewed from in front; 6, crowns of right upper molars;, c, out^r 



lateral view of right upper molars 180 



16. — Odocoileus crooki. Metatarsal gland of type 185 



17. — Odocoileus crooki. Tail of type, a, Upper surface; 6, lower sur- 

 face.' 186 



18. — Odocoileus crooki. Skull of type, a, Lateral view; o, dorsal view; 



c, ventral view ^ 188 



19. — Diagram showing position of vomer with relation to basi-sphenoid. 



a, Odocoileus hemionus canus; 6, Odocoileus couesi; c, Odocoi- 

 leus crooki.- (Type. ) 189 



20. — Odocoileus crooki. Teeth of type, a, Profile of right upper molar 

 series; 6, crowns of same; c, profile of right lower molar series; 



d, crowns of same; e, incisor-canine series, front view 190 



21. — Odocoileus hemionus canus. Metatarsal gland e 192 



22. — Odocoileus hemionus canus. a, Upper surface of tail; 6, lower sur- 

 face 192 



23. — Odocoileus hemionus canus. Bl Paso, Texas : 195 



24. — Teeth of Odocoileus hemionus canus. a, Profile of right upper molar 

 series; 6, crowns of right upper molar series; c, profile of right 

 lower molar series; d, crowns of right lower molar series; e, incisor- 

 canine series, front view 195 



25. — Diagram of antlers of Odocoileus hemionus canus 196 



26. — Antlers of Odocoileus' hemionus eremicus 210 



27. — Odocoileus hemionus californicus. Skull of young male 211 



28. — Odocoileus hemionus californicus. a, Tail, upper surface; 6, tail, 



under surface 211 



29. — Odocoileus hemionus californicus. Metatarsal gland 212 



30. — Odocoileus hemionus californicus. Teeth of young male, u. Pro- 

 file of right upper molar series; 6, crowns of right upper molar 

 series; c, profile of right lower molar series; d, crowns of right 



lower molar series; e, incisor-canine 'series, front view 212 



31. — Antilocapra americana mexicana. « and c. Forefoot; b and d, 



hindf oot 220 



32. — Antilocapra americana mexicana. Tail, a, Upper surface; 6, lower 



surface 221 



33. — Skull of Antilocapra americana mexicana 225 



34. — Horn of Ovis canadensis mexicana 236 



35. — Ovis canadensis gaillardi. Feet of adult male, a and 6, Forefoot; 



c and d, hindf oot 240 



36. — Ovis canadensis gaillardi. Skull of type 241 



37. — Ovis canadensis gaillardi. Skull of adult male, a, Lateral view; 



h, dorsal view 241 



38. — Ovis canadensis gaillardi. Horn of type ". 242 



39. — Ovis canadensis. Skull of adiilt male. Three Buttes, Montana. 



a, Lateral view; h, dorsal view 243 



40. — Sciurus mearnsi. (Type.) a, Dorsal view; 6, ventral view; c, 



lateral view 263 



