CONTENTS OF THE FIRST VOLUME. 
PART I. 
THE PRINCIPLES AND GENERAL PHENOMENA OF DISTRIBUTION. 
CHAPTER: +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 (p. 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)—Organie Changes as affecting Distribution (p. 44) - 385—49 
Vou. I—2 
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