viii PREFACE. 



ledgments are due for permission to reproduce those illustra- 

 tions of Palaeolithic Implements which are taken from Reliquiae 

 Aquitanicce, and which appear in Plate B. I have further to 

 thank my friend Dr. Buchanan White for many important 

 suggestions and much assistance while my work was in pre- 

 paration. I have enjoyed the great advantage of discussing with 

 him many of the questions which form the chief subject-matter 

 of this volume, and his wide and accurate knowledge of the 

 geographical distribution of plants and animals, which he 

 generously placed at my disposal, has been of most essential 

 service. 



Perth, October 1880. 



