LIST or WOODCUTS. 



INTRODUCTION. 



Page. 



FiGUKE 1. M.ip sliowing region of Uinoceras liefls, _ 3 



" 2. Section to illustrate vertebrate life ill America, 7 



CII.APTER 1. 



Fkutrk 3. Nasals of Dinoceras rnirabile, 13 



" 4. Nasals of Dhioceras distans, .... ... 13 



" 5. Nasals of T/'noceras pitr/nax, 13 



" 6. Nasals of llnoceras aiinectens, 13 



" 1. Skull of Z>mocc?Yfs w?^-^^;/^, with brain-cast in iiosition, 15 



" 8. Skull of young specimen of Dinoceras dis/aus, . 15 



" 9. Skull of TWiocerrts i?i(/ens, with hvam-caat in jwsition, _, 16 



" 10. Skull of Dinoceras distans, 16 



" 11. Skull of JJintatherium latifroiis, _. .... ._ 17 



" 12. Skull of Tinoceras vagans, 17 



" 13. Posterior surface of skull of />««oce)<jf.s jwiVfr/^/fe, -..._. 19 



" 14. Posterior surface of skull of Z'</(oec;-Q!s ^«//ee/w, ... 19 



" 1 •"). Posterior surface of skull of Dinoceras cr/reste, 19 



" 16. Posterior surface of skull of Tinoceras affine, 19 



" 1 7. Posterior surface of skull of Tinoceras incjens, 19 



" 1 8. Posterior surface of skull of Tinoceras jmffnct.v, 19 



" 19. Side view of skull of Tinoceras puf/nax, 21 



" 20. Anterior part of skull of Tinoceras grande, .. 21 



" 21. Anterior part of skull of Tinoceras annertens, 21 



" 22. Anterior part of palate of Dinoceras laticeps, ... . . 25 



" 23. Anterior ])art of palate of Tinoceras ingens, . 25 



" 24. Anterior part of palate of Tinoceras pngnax, 25 



" 25. Anterior fart oi Isolate oi IIi2}popotamus a7n2}hibius, 25 



" 26. Skull of Dinoceras mirabile; seen from below, 26 



" 27. Skull of Dinoceras laticeps; seen from below, 26 



" 28. Skull of Tinoceras ingens; seen from below, .. 27 



" 29. Skull of Tinoceras pxignax; seen from below, - . 27 



" 30. Horizontal section of skull of 7'i«ocer«s erass(/>o?is, ... 29 



" .31. Horizontal section of skull of Z>*«orer«s (/j's^ft/^s, 29 



" 32. Horizontal section of skull of y/^ioecrcfs /««■«;/«, . 30 



" 33. Horizontal section of skull of Z>(Hoee)'«s ;«</cc/>s, 30 



" 34. vertical longitudinal section of skull of Dinoceras rnirabile, 31 



" 35. Vertical transverse section of skull of Dinoceras mirabile, 31 



