CONTENTS. 



CHAPTER I. 



PAGE 



INTRODUCTION .................. 1-36 



CHAPTER II. 

 PRELIMINARY CONSIDERATIONS ......... 37~88 



CHAPTER III. 



THE FAUNA OF BRITAIN ... ......... 89-13! 



CHAPTER IV. 



THE ARCTIC FAUNA ............. .. 132-188 



CHAPTER V. 



THE SIBERIAN MIGRATION ............ 189-244 



CHAPTER VI. 



THE ORIENTAL MIGRATION ... . ........ 245-286 



CHAPTER VII. 



THE LUSITANIAN FAUNA ............ 287-308 



CHAPTER VIII. 



THE ALPINE FAUNA ... ............ 



BIBLIOGRAPHY ............... 35^354 



INDEX .................. 355-364 



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