PREFACE TO THE SECOND EDITION 



This edition has been carefully revised througliont, and 

 owing to the great increase to onr knowledge of the Natural 

 History of some of the islands during the last twelve years 

 considerable additions or alterations have been required. 

 The more important of these changes are the following : — 



Chapter YII. The account of the migrations of animals 

 and plants during and since the Glacial Epocli, has been 

 modified to accord with newer information. 



Chapters VIII and IX. The discussion of the causes of 

 Glacial Epochs and Mild Arctic Climates has been some- 

 what modified in view of the late Dr. Croll's remarks, and 

 the argument rendered clearer. 



Chapter XIII. Several additions to the Fauna of the 

 Galapagos have been noted. 



Chapter XV. Considerable additions have been made 

 to this chapter embodying the recent discoveries of birds 

 and insects new to the Sandwich Islands, while a much 

 fuller account has been given of its highly peculiar and 

 very interesting flora. 



Chapter XVI. Important additions and corrections have 

 been made in the lists of peculiar British animals and 

 plants embodying the most recent information. 



Chapter XVII. Very large additions have been made 

 to the mammalia and birds of Borneo, and full lists of the 

 peculiar species are given. 



