CONTENTS. 



PAGE 



The Bodies of Space, their Arrangements and Formation . 1 

 Constituent Materials of the Earth, and of the other Bodies 



of Space 16 



The Earth Formed Geological Changes 24 



Lower and Upper Silurian Formations First Forms of 



Life 27 



Upper Silurian .36 



Devonian Era Fishes Abundant 38 



Carbonigenous Era Land Plants and Animals ... 45 



Permian Era Reptiles 59 



Era of the Trias and Oolite Reptiles Abundant First 



Traces of Birds and Mammalia 62 



Trias 63 



Oolite 69 



Cretaceous Era 82 



Era of the Tertiary Formation Mammalia Abundant . 86 

 Era of the Superficial Formations Existing Specific 



Forms Abundant 95 



General Considerations respecting the Origin of the Ani- 

 mated Tribes 101 



Particular Considerations respecting the Origin of the Ani- 

 mated Tribes Ill 



Hypothesis of the Development of the Vegetable and Animal 



Kingdoms 123 



Affinities and Geographical Distribution of Organisms . . 164 



Early History of Mankind 230 



Mental Constitution of Animals 253 



Purpose and General Condition of the Animated Creation . 270 



