viii LIST OF TEXT ILLUSTRATIONS. 
Fig. 26. Nesodon imbricatus: Left fore-arm bones, outer side, X j . . . • 155 
Fig. 27. Toxodon burmeisteri: Left manus, dorsum, Xf. La Plata Museum . . 157 
Fig. 28. Nesodon imbricatus: Left manus, dorsum, X| ...... 157 
Fig. 29. Toxodon burmeisteri: A. left femur, dorsum. B. the same, external view, 
Also left patella, dorsum. All Xi- La Plata Museum. .... 166 
Fig. 30. Nesodon imbricatus: A. left femur, dorsum; B. the same, external view. Also 
left patella, dorsum. All Xi- ........ 167 
Fig. 31. Toxodon burmeisteri: Left tibia and fibula, dorsum, Xj. La Plata Museum . 169 
Fig. 32. Nesodon imbricatus: Left tibia and fibula, dorsum, X|. . . . . 169 
Fig. 33. A. Toxodon burmeisteri: Left pes, dorsum, Xj. B. the same, external view. 
La Plata Museum. .......... 176 
Fig. 34. Nesodon imbricatus: Left pes, dorsum, X| . . . . . . 176 
Fig. 35. Nesodon cornutus, type: Skull, right side, Xi ...... 196 
Fig. 36. Nesodon cornuhis, type; Occiput, Xi. . . . . . . . 197 
Fig. 37. Nesodon imbricatus: Occiput, Xi . . . . . . . 198 
Fig. 38. Nesodon cornutus, type: Forehead, showing horn and fronto-nasal suture, Xf . 199 
Fig- 39- Adinotherium ovinum: Left premaxilla with permanent incisors and prelacteal i-, 
Xi 202 
Fig. 40. Adinotherium ovinum: Series showing the variations of the fronto-nasal suture 
and the frontal horn, Xi . . . . . . . . 204 
Fig. 41. Trigodon gaudryi: Skull, left side, about xi - . Ameghino collection, Monte 
Hermoso Beds ........... 221 
Fig. 42. Stenotephanos speciosus: Fragment of right upper maxillary with molars in place. 
About Xt- Type specimen, La Plata Museum ..... 236 
Fig. 43. Homalodontotherium segovice: Second and third upper molars of left side, Xt- 
Oblique view of grinding surface ........ 253 
Fig. 44. Homalodontotherium segovice: Left pes, dorsum, Xi- After Ameghino, except 
the calcaneum, astragalus and cuboid. ....... 280 
Fig. 45. Sus scrofa, Occiput, Xi . . . . . . . . . . 291 
Fig. 46. Procavia capensis. Occiput, xf ........ 291 
