CONTENTS 



CHAPTER I PAGE 



Animals which have lately become Extinct — 



The Strata of the Earth's Crust . . 1 



CHAPTER II 



Strata and Land Surfaces — Teeth and Bones — 

 Extinct Men — ^Flint Implements — The Mam- 

 moth Elephants and Mastodon — Classifi- 

 cation OF Animals ..... 59 



CHAPTER III 



The Ancestral History of Elephants — Extinct 

 Horses and Rhinoceroses — The Arsinoithe- 

 RIUM ........ 103 



CHAPTER IV 



Extinct Giraffes and the Okapi — The Giant 

 Sloths of South America and the Giant Kan- 

 garoos OF Australia ..... 155 

 vii 



