18 CONTENTS 



CHAPTER X 



PAGE 



The Carnivores 172 



Divergence in Evolut 



ion. 



CHAPTER XI 



The Rodents 188 



A Study in the Evolution of Herbivorous Types. 



CHAPTER XII 

 The Artiodactyl Ungulates 199 



CHAPTER XIII 

 The Perissodactyl Ungulates 212 



CHAPTER XIV 

 The Elephants and Sea Cows 220 



CHAPTER XV 



The Hyraces 226 



CHAPTER XVI 



The Bats 230 



CHAPTER XVII 



The Whales and Porpoises 233 



CHAPTER XVIII 

 The Monotremes 236 



CHAPTER XIX 

 The Deciduous Dentition 239 



CHAPTER XX 

 The Roots of Teeth 257 



CHAPTER XXI 

 The Evolution op Types 267 



APPENDIX 

 Appendix 282 



