XII LIST OF ILLUSTRATIONS. 



Page. 

 Fig. 11. — Odocoileus couesi. Metatarsal gland 176 



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



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



13. — Odocoileus couesi. a, Skull, lateral view; h, 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; h, crowns of right upper molars; c, outer 



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; b, dorsal view; 



c, ventral view 188 



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



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

 leus crooki. ( Type. ) 189 



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

 series; h, 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, Upijer surface of tail; h, l(jwer sur- 

 face 192 



23. — Odocoileus hemionus canus. El Paso, Texas 195 



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

 series; b, 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; h, tail, 



under surface 211 



29. — Odocoileus hemionus californicus. Metatarsal gland 212 



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

 file of right upper molar series; b, 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. a and c, Forefoot; b and (/, 



hindfoot 220 



32. — Antilocapra americana mexicana. Tail, o. Upper surface; b, 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 b, Forefoot; 



c and d, hindfoot 240 



36. — Ovis canadensis gaillardi. Skull of type 241 



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



b, dorsal view 241 



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



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



«, Lateral view; b, dorsal view 243 



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



lateral view 263 



