xii ILLUSTRATIONS 



PLATH FACING PAGE 



XXIIL Skeleton of "Hippidium" .... 252 



{Brit. Mus. Guide to Horse Family) 



XXIV. Fig. i. Skull of " Onohippidium" . . 260 



Fig. 2. Molars of " Equus," " Hippidium," 



AND " HiPPARION " „ 



(Both from " Drit. Mus, Guide to Horse Family") 



TEXT-FIGURES 



PAGE 



Bones of Fore-leg of Horse and Rhinoceros . . 6 



(Brit. Mus. Guide to Great Game) 



Skull of Pig-like Animal, "Elotherium" . . 20 



Molars of Single-toed and Thre2-toed Horses . 33 



The Ancestors of the Horse and its Relatives 



compared ........ 240 



{After Lull) 



Milk-molars and Premolars of the Extinct " Mkryc- 



hippus" 255 



[After Lull) 



Bones of the Fore and Hind Fket of the Extinct 



"Hipparion" 257 



[After Lull) 



Crown Surface of Upper Molar of the Extinct 



" HiPPARION " 258 



(After Lull) 



Bones of the Fore and Hind Feet of the Extinct 



"Hypohippus" ....... 261 



[After Lull) 



Upper Molar Tooth of " Anchitherium" . . 267 



Bones of the Fore and Hind Feet of the Extinct 



"EoHipPUs" 274 



[After Lull) 



Bones of the Fore and Hind Feet of the Eocene 



"Phen.\coi)Us" 276 



(After Lull) 



