viii LIST OF ILI.USTKATIONS IN TEXT. 



FIG. PAGE 



19. Third right lower true molar tooth of Sits cristatus, a living 



Indian Pig 30 



20. Third right upper true molar tooth of Ancodus [Hyojwtaimis] 



hovinus, from the Oligocene Hempstead Beds, Isle of 

 Wight 31 



21. Skeleton of Ancodus [Hyopotamus] hrachyrhynclius, from 



the Oligocene of Dakota, U.S.A. (After W. B. Scottj . 32 



22. Plight upper teeth of Anoplothcriitm cayluxense, from the 



Oligocene Phosphorites of France ..... 33 



23. Plight upper teeth of immature A nojjlotheriuyn secundaritim, 



from the Upper Eocene of Debruge, France . . .33 



24. Skiill of Cxnotherium filholi, from the Oligocene Phospho- 



rites of France ........ 84 



25. Reduced side-view of skull of existing Che%Totain (Tragulus 



javaniciis), from the Malayan region . . . .35 



26. Mandible and teeth of Dichodon cusjndatus, irora the Upper 



Eocene of Hordwell, Hampshire ..... 36 



27. Skull and mandible of Samotherium hoissieri, from the 



Lower Pliocene of the Isle of Samos . . . .37 



28. Skull of Sivatherium giganteum, from the Lower Pliocene 



of the Siwalik Hills, India ...... 38 



29. Skeleton of the Irish Deer, Cervus (Megaceroa) giganteus. 



from shell -marl beneath the peat, Ireland ... 39 



30. Antler of Pied Deer {Cervus elaphus), one of a pair dredged 



from the Piiver Boyne at Drogheda, Ireland ... 40 



31. Skull and antlers of Pieindeer (Bangifer tarandus), from 



Bilney ^loor. East Dereham, Norfolk. (After Owen) . 40 



32. Antlers of fifth and sixth years of ''Cervus" tetraceros, 



from the Upper Pliocene of Peyrolles, France ... 41 



33. Antlers of various Deer (Cervidae) ..... 42 



34. Skull of Bos primigenius, from the Pleistocene of Athol, 



Perthshire ......... 43 



35. Outline of upper view of skull of Corypjhodon hamatus, 



to show the small size of the brain, with drawings 

 of feet ; from the Lower Eocene of Wyoming, U.S.A. 

 (After Marsh) " . . .45 



36. Left upper and lower teeth of Coryjjhodon hamatus, from 



the Lower Eocene of Wyoming, U.S.A. (After Marsh) . 45 



37. Skeleton of Tinoceras ingens, from the Middle Eocene of 



Wyoming, U.S.A. (After ^larsh) ..... 46 



38. Skull and mandible of Arsinoitherium zitteli, from the Upper 



Eocene of the Fayum, Egypt ..... 47 



39. Skeleton of Phenacodus pirimxvus, from the Lower Eocene 



of Wyoming, U.S.A. (After Cope) . . . .49 



40. Skeleton of Plienacodus 2>Tirnsevus, as now mounted in the 



American Museum of Natural History .... 50 



41. Skeleton of Toxodon platensis, from the Pampa Formation 



of Buenos Aires, Argentine Piepublic . . . .51 



42. Skeleton of ^lammoth (Eleplias primigenius), with remains 



of dried skin on head and feet, from frozen earth near the 

 mouth of the Paver Lena, Siberia ..... 53 



43. View of gi-inding surface of left last upper molar of Mammoth, 



dredged off the Dogger Bank, North Sea ... 55 



