Xll ILLUSTRATIONS 



FIG. PAttB 



23. Prox furcatus. Left antler 1GO 



24. A. Left fore-foot of the Bed Deer 162 



B. Left fore-foot of the Roe 162 



C. Second row of tarsals and metatarsals of Gelocus . 162 



25. A. Left fore-foot of Hysemosehus aquaticus . . . 168 

 J5. Left fore-foot of Hyopotamus 168 



26. Skull of a Short-horned Bull 175 



27. Skull of the Gazelle 176 



28. Skull of the Bison americanus . . . . . 180 



29. Skull of the Anoa 181 



30. Skull of Cainotherium metopias 183 



31. Skull of the Tapir (Tapirus americanus) . . .191 



32. Back molar, below to the left, of Lophiodon parisi- 



ensis 192 



33. Skull of Elasmotherium 197 



34. A. Skull of Brontotherium ingens 199 



B. The same from above with a drawing of the brain . 199 



35. Palseotherium. Hipparion. Horse . . . . 202 



36. Left hind-foot of Anchitherium 204 



37. Right upper cheek-tooth of the Horse . . . . 209 



38. Foot of the fossil Horses of North America . . . 213 



39. Macrauchenia patagonia . 229 



40. Polished molar of Mastodon angustidens . . . 232 



41. Portion of a cheek-tooth of Mastodon elephantoides . 233 



42. Portion of a cheek-tooth of the Mammoth, polished 



sideways 235 



43. Skull of Dinotherium giganteum . . . . 237 



44. Skull of Dinoceras mirabile 241 



45. Skull of the Delphinus lagenorhynchus, Gray . . . 249 



46. Right fore-leg of Delphinus delphis .... 250 



47. Tooth of Squalodon 253 



48. Teeth of the Fox 261 



49. Lower jaw of Icticyon 266 



50. Skull of Tillotherium fodiens, from above . . . 286 



51. Foetal teeth of the Greenland Seal 290 



