XU CONTENTS. 



PART II. 



GEOLOGICAL DISTRIBUTION. 



I. 



PAGE 



The aaccessioii of litis. — Faunas of the different geological periods . .133 



II. 



Appearance aad disappearance of species. — Eeappearance. — Extinction. — 

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

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

 logical formations 181 



PAKT III. 

 GEOGSAPBICAL AND GEOLOGICAL DISTRIBUTION. 



I. 



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

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

 Insecta, AracJinida, and Myriapoda 234 



II. 



Distiibution of the Vertebrata. — Fishes. — Amphibians. — Eeptiles. — Birds. 

 — Mammals 287 



