xviii CONTENTS OF THE FIRST VOLUME. 
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)— Palsearctic Region 
(p. 71)— Ethiopian Region (p. 73)— Oriental Region (p. 75)— Australian Re- 
gion {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) — Classifica- 
tion of Reptiles (p. 98) — Classification of Amphibia (p. 100) — Classification of 
Fishes (p. 101)— Classification of Insects (p. 102)— Classification of Molluscs 
(P- 104 ) 83—104 
PART II. 
ON THE DISTRIBUTION OF EXTINCT ANIMALS. 
CHAPTER Vr. 
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 
