CONTENTS 



LECTURE I 



Present Status of the Question . . 



LECTURE II 



Evidences for the Theory Classification, Domestica- 

 tion and Comparative Anatomy 27 



LECTURE III 



Evidence from Embryology and Blood Tests ... 57 



LECTURE IV 



Evidence from Palaeontology 82 



LECTURE V 



Evidence from Geographical Distribution .... 120 



LECTURE VI 

 Evidence from Experiment Conclusion 149 



