ILLU stbation s 



FIG. P.A.GB 



r Comparative view of skeletons of man and horse 



(Frontispiece) 



1. Diagrammatic representation of skeletons of the fore 



foot of perissodactyle and artiodactyle ungulates . 14 



2. Restoration of the skeleton of Phenacodus primcevus . . 21 



3. Upper molar teeth of Phenacodus^ Hyracotherium, and 



Anchitherium 30 



4. Bones of the foot of Anchitherium 34 



5. Bones of the foot of Hipp ar ion . . . . • .36 



6. Bones of the foot of horse • 37 



7. Plantar surface of fore and hind foot of Malay tapir . 44 



8. American tapir (Tapirus americanus) 47 



9. Indian rhinoceros (Rhinoceros unicornis) . . . ,57 



10. Section of molar tooth of Hipparion . . . . . 66 



11. African wild ass (Equus asinus) and foal .... 82 



12. Common or mountain zebra (Equus: zebra) , . . • 85 



13. Burchell's zebra (Equus burchelli) ...» 87 



14. Quagga (Equus quagga) 90 



15. Side view of skull of man 100 



16. Side view of skull of horse ....... 101 



17. Incisor tooth of Anchitherium aurelianense . . . 113 



18. Unworn crown of temporary incisor tooth of young horse . 113 



19. Incisor tooth of horse with the crown partially worn . 114 



