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)--Dispersal 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 Continental Areas (p. 38)--The Glacial Epoch as affecting the Distribution of Animals (p. 40)--Changes of Vegetation as affecting the Distribution of Animals (p. 43)--Organic Changes as affecting Distribution (p. 44) 35-49 CHAPTER IV. ON ZOOLOGICAL REGIONS. Principles upon which Zoological Regions should be formed (p. 53)--Which class of Animals is of most importance in determining Zoological Regions (p. 56)--Various Zoological Regions proposed since 1857 (p. 58)-- Discussion of proposed Regions (p. 61)--Reasons for adopting the Six Regions first proposed by Mr. Sclater (p. 63)--Objections to the system of Circumpolar Zones (p. 67)--Does the Arctic Fauna characterise an independent Region (p. 68)--Palæarctic Region (p. 71)--Ethiopian Region (p. 73)--Oriental Region (p. 75)--Australian Region (p. 77)--Neotropical Region (p. 78)--Nearctic Region (p. 79)--Observations on the series of Sub-regions (p. 80) 50-82 CHAPTER V. CLASSIFICATION AS AFFECTING THE STUDY OF GEOGRAPHICAL DISTRIBUTION. Classification of the Mammalia (p. 85)--Classification of Birds (p. 92)-- Classification of Reptiles (p. 98)--Classification of Amphibia (p. 100)-- Classification of Fishes (p. 101)--Classification of Insects (p. 102)-- Classification of Mollusca (p. 104) 83-104 PART II. ON THE DISTRIBUTION OF EXTINCT ANIMALS. CHAPTER VI. THE EXTINCT MAMMALIA OF THE OLD WORLD. Historic and Post-pliocene Period (p. 110)--Pliocene Period (p. 112)-- General Conclusions as to the Pliocene and Post-pliocene Faunas of Europe (p. 113)--Miocene Period (p. 114)--Extinct Animals of Greece (p. 115)-- Miocene Fauna of Central and Western Europe (p. 117)--Upper Miocene Deposits of India (p. 121)--General Observations on the Miocene Faunas of Europe and Asia (p. 123)--Eocene Period (p. 124)--General Considerations on the Extinct Mammalian Fauna of Europe (p. 126) 107-128