CONTENTS 



CHAPTER I 



]'AGE 



The Evidence for Evolution . . . . « . i 



CHAPTER II 

 Unicellular and Multicellular Anul\i.s . . . . -23 



CHAPTER III 



The Worms and some of their Posterity . . . . « 58 



CHAPTERIV 

 The Early Vertebrates and the Fishes . . . . - 79 



CHAPTER V 



The Conquest of the Land . . . . . . .104 



CHAPTER VI 

 The Mammals and Man . . . . . , .12^ 



For many of the illustrations the Publishers are indebted 

 to the Deutsche Verlags-Anstalt (from Giinther's Vom 

 Urtier zum Menschefi) and Herr Wilhelm Engelmann 

 (from Haeckel's Aiithropogenie). 



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