Xll CONTENTS. 



PART n. 



GEOLOGICAL DISTRIBUTION. 



I. 

 The succession of lite. — Faunas of the different geological periods . .133 



n. 



Appearance and disappearance of species. — Eeappearauoe. — Extinction. — 

 Persistence of type-structures. — Variation. — Geological breaks. — 

 Geographical distribution. — Climatic zones. — Synchronism of geo- 

 lo^cal formations 181 



PAGE 



PAET III. 

 GEOGRAPHICAL AND GEOLOGICAL DISTRIBUTION. 



I. 



The present and past distribution of individual animal groups. ^ — Forami- 

 nifera. — Corals. — Brachiopoda. — MoUusca generally. — Crustacea. — 

 Insecta, Aiaolmida, and Myriapoda 234 



II. 



Distribution of the Vei-tebrata.— Fishes. — Amphibians. — Eeptiles.— Birds. 

 — Mammals 287 



