LIST OF ILLUSTRATIONS. 



Page 

 Fig, 1. — Palatal aspect of teeth of Adapts magna (Filliol), Upper Eocene, 



Hordwell, Hants . . . . . . . . . . . . 5 



2. — Right upper cheek-teeth of Microchoerus erinaeeus (Wood), 



Upper Eocene, Hordwell, Hants .. .. .. .. 5 



3. — Eight ramus of mandible of Viverra Hastmgsim (Davies), 



Upper Eocene, Hordwell, Hants . . . . . . . . 6 



4. — Skull of Maehoerodus neogaus (Lund), Pleistocene, Buenos 



Ayres, South America . . .. .. .. .. .. 6 



5. — Right upper carnassial tooth oiHycena striata (Zinim.), Suffolk 



Crag . . . . . . . . . . . . . . . . 6 



6. — Right ramus of mandible of Cephalogale brevirostris (Croizet), 



Upper Eocene, Bach, France . . . . . . .-. . . 6 



7. — Profile of skull of TJrsus spelceus (Rosenmuller) , Pleistocene 



Cares of Germany and France . . . . . . . . 7 



8. — Skull of Cynomys ludovicianus (Baird), "the Prairie Marmot," 



Missouri . . . . . . . . . . . . . . . . 9 



9. — Dentition of Bearer, Castor europceus (Owen), Pleistocene, 



Cambridgeshire Fens (in Peat) . . . . . . . . 9 



10. — Skull of Dinotherium giganteum (Kaup), Upper Miocene of 



Eppelsheim, Hessen-Darmstadt .. .. .. ..11 



11. — Left upper molars of Dinotherium giganteum (Kaup\ Middle 



Miocene. Sansan, France . . . . . . . . 12 



12. — First right lower true molar of Mastodon sivalensis (Cautlej), 



Older Pliocene, Siwalik Hills, India 12 



13. — Fourth left upper milk molar of Mastodon arvernensis (Croizet 



et Jobert), Norwich Crag .. .. .. . . ..13 



14. — Skull of Mastodon longirostris (Kaup), Upper Miocene, Eppels- 

 heim, Germany.. .. .. .. .. .. ..13 



15. — Lower molar of living Indian Elephant (much reduced) .. 14 



16. — Upper ., ,, African „ ,, 14 



17. — Vertical longitudinal section of molar of Etephas planifrons 



(Falc. and Cautl.), Pliocene, Siwalik Hills, India .. .. 15 



18. -—View of grinding-surface of molar of " Mammoth," Elephas 



primigenius (Blum.), Dogger Bank .. .. .. ..15 



19. — Grinding surface of molar of JSlephas antiquus (Falconer), 



Pleistocene, Grays, Essex .. .. .. .. ..16 



20. — Grinding surface of molar of Elephas meridionalis (Nesti), 



Upper Pliocene, Tuscany . . . . . . . . 16 



21. — Left lower milk molar of Mastodon angustidens, var. pala- 



indicus (Lydekker) , Lower Siwaliks. India . . . . . . 17 



