CONTENTS OF THE EIEST VOLUME. 



PAET I. 



THE PEINCIPLES AND GENEKAL PHENOMENA OF DISTRIBUTION. 



CHAPTEE I. 



INTRODUCTORY. 



CHAPTER II. 



THE MEANS OF DISPERSAL AND THE MIGRATIONS OF ANIMALS. 



Means of Dispersal of Mammalia (p. 10) — Climate as a Limit to the Range of 

 Mammals (p. 11) — Valleys and Rivers as Barriers to Mammals (p. 12) — Arms 

 of the Sea as Barriers to Mammals ([j. 13) — Ice-floes and drift-wood as aiding 

 the Dispersal of Mammals (p. 14) — Means of Dispersal of Birds (p. 15) — Dis- 

 persal of Birds by Winds (p. 16) — Barriers to the Dispersal of Birds (p. 17) — 

 The Phenomena of Migration (p. 18) — Migrations of Birds (p. 19) — General 

 remarks on Migration (p. 25) — Means of Dispersal of Reptiles and Amphibia 

 (p. 28)— Means of Dispersal of Fishes (p. 29)— Means of Dispersal of Mollusca 

 (p. 30)— Means of Dispersal of Insects and the Barriers which limit their 

 Range (p. 32) 10—34 



CHAPTER III. 



DISTRIBUTION AS AFFECTED BY THE CONDITIONS AND CHANGES OF THE EARTH'S 



SURFACE. 



Land and Water (p. 35)— Continental Areas (p. 36)— Recent Changes in the Con- 

 tinental Areas (p. 38)— The Glacial Epoch as affecting the Distribution of 

 Animals (p. 40)— Changes of Vegetation as affecting the Distribution of Ani- 

 mals (p. 43)— Organic Changes as affecting Distribution (p. 44) . 35—49 



Vol. I.— 2 



