LIST OF ILLUSTRATIONS IN TEXT. IX 



FIG. PAGE 



44. Mandible of ^Mammoth, dredged off the Dogger Bank . . 55 



45. View of grinding surface of right second lower molar of 



Ehplias anfiquus. from the Pleistocene of Grays, Essex . 56 



46. View of grinding surface of upper molar of Elej^has meridio- 



?talis, from the Upper Pliocene of Tuscany . . 57 



47. Vertical longitudinal section of lower niolar of Mastodon . 58 



48. Vertical longitudinal section of molar of ElejjJias (Stegodon) 



insigms, from the Lower Pliocene of the Siwalik Hills, 

 India ......... 58 



49. Vertical longitudinal section of molar of EJcphas lAanifrons, 



from the Lower Pliocene of the Siwalik Hills ... 58 



50. View of grinding surface of lower molar of Mastodon siva- 



li'iisis. from the Lower Pliocene of the Siwalik Hills . 59 



51. View of grinding surface of upper molar of Eleplias (Stegodon) 



cUfti, from the Lower Pliocene of the Siwalik Hills . 59 



52. View of part of grinding surface of upper molar of ElejjJias 



2)Janifrons, from the Lower Pliocene of the Siwalik Hills 59 

 58. Lower molar of Mastodon amcricnuus, from the Pleistocene 



of North America ....... 60 



54. Skeleton of Mastodon a»tericanns, from the Pleistocene. 



Missouri, U.S.A 61 



55. Skeleton of Tetrahdodon aiigiistidens, from the Middle 



Miocene of Sansan, France ...... 62 



56. Left upper milk-molars of Tetrabelodon longirostris, from 



the Lower Pliocene of Eppelsheim, Hesse-Darmstadt . 62 



57. Skull and mandible of DinotJieriuni gigaiitfiiiii. from the 

 Lower Pliocene of Eppelsheim ' .... 63 



58. Left upper teeth of Dinotlicriinn levins, from the Middle 



Miocene of Sansan ...... 63 



59. Skull and mandible of EJcphas (Stegodon) ganrsa. from the 



Lower Pliocene of the Siwalik Hills, India ... 64 



60. Skull and mandible of Tetrabelodon angnstideus, from the 



^Middle ]\Iiocene of Sansan, France. (After C. W. Andrews) 64 



61. Skull and mandible of Pala'omastodon headnelU, from the 



Upper Eocene of the Fayum, Egypt. (After C. W. Andrews) 65 



62. Skull and mandible of MoeritJierium Igonsi. from the ^Middle 



Eocene of the Fayum. Egypt. (After C. W. Andrews) . 65 



63. Teeth of Beaver (Castor fiber), from the Fens of Cambridge- 



shire . . . " 67 



64. Skeleton of Steller's Sea-cow (lilnjtina gigas), from the 



Pleistocene of Bering Island ...... 68 



65. Skeleton of Halitherium schinzi, from the Oligocene of 



Hesse-Darmstadt . ...... 69 



66. Tympanic bone of Whalebone-Whale (Balxna primigeriia), 



from the lied Crag of Suftblk 70 



67. Skull and upper molar tooth of Zeuglodon cetoides, from 



the Eocene of Alabama, U.S.A. ..... 70 



68. Skeleton of ScelidotJteriinn U'lAocephaluni, from the Pampa 



Formation of Buenos Aires, Argentine llepublic . . 72 



69. Lower jaw of Megatlicriuni. aniericanum, from the Pampa 



Formation of Buenos Aires ...... 73 



70. Skeleton of Glyptodon clavipes, from the Pampa Formation 



of Buenos Aires ........ 75 



