tLAl^E it. 



Fig. 1. Ancodus brachyrhynchus^ Osb. and Wort. ; right upper third molar, viewed from 



below. Page 24. 

 Fig. 2. Ancodus brachyrhynchus f, Osb. and Wort. ; left upper third premolar, external view. 

 Fig. 3. The same tooth viewed from below. 



Fig. 4. Ancodus brachyrhynchus f Osb. and Wort. ; right lower canine, viewed from within. 

 Fig. 5. The same tooth, viewed from without. 



Fig. 6. Ancodus brachyrhynchus ? Osb. and Wort. ; right lower third incisor, exterior view. 

 Fig. 7. The same tooth, interior view. 



Fig. 8. Aneolus brachyrhynchus? Osb. and Wort. ; left lower first incisor; exterior view. 



Fig. 9. The same, seen from within. 



Fig. 10. Eloiherium coarclatum, Cope ; right upper first molar, viewed from below. Page 26. 



Fig. 11. Elotherium coarctatum, Cope ; right upper third molar, as viewed Irom below. 



Fig. 12. Elotherium coarctatum f Cope ; right upper third premolar, outer aspect. 



Fig. 13. Same tooth, seen from below. 



Fig. 14. Elotherium coarctatum f Cope ; right upper fourth premolar, inner aspect. 



Fig. 15. The same specimen, viewed from below. 



Fig. 16. Agriochoerus antiquus? Leidy ; left upper third molar, crown view from below. 



Page 28. 



Fig. 17. Agriochoerus antiquus ? Leidy ; left upper third molar, viewed from below. 



Fig. 18. Merycoidodon culbertsoni, Leidy ; left lower first premolar (caniniform), outer 



aspect. Page 29. 



Fig. 19. The same as seen from within. 



Fig. 20. Merycoidodon culbertsoni, Lejdy ; left upper canine, inner aspect. 



Fig. '21 . The same tooth, posterior a.=!pect. 



Fig. 22. Outline of transverse section of same at a. 



Fig. 23. Outline of transverse section at b. 



Fig. 24. Merycoidodon culbertsoni, Leidy ; right lower second molar, inner view. 



Fig. 25. The same tooth, viewed from without. 



Fig. 26. The same, viewed from above. 



Abbreviations for cusps, etc., as in plate IIL 



