xiv CONTENTS. 



CHAPTER XXIII. 



The succession of life upon the globe Gradual and succes- 

 sive introduction of life-forms What is meant by 

 " lower " and " higher " groups of animals and plants 

 Succession in time of the great groups of animals in the 

 main corresponding with their zoological order Identi- 

 cal phenomena in the vegetable kingdom Persistent 

 types of life High organization of many early forms 

 Bearings of Palaeontology on the general doctrine of 

 Evolution 381-388 



APPENDIX. Tabular view of the chief Divisions of the Ani- 

 mal Kingdom 389-392 



GLOSSARY 393-415 



INDEX 416-430 



