TABLE OF CONTENTS. 



PACE 



Introductory Remarks . . . . .1 



Determination of Fossil Plants .... 3 



Mode of Preservation of Fossil Plants . . .8 



Examination of the Structure of Fossil Plants . 12 



FOSSILIFEROUS RocKS . . . • .20 



Natural Orders to which Fossil Plants belong . 22 



Periods of Vegetation among Fossil Plants . . 25 



Fossil Flora of the Primary or Paleozoic Period . 26 



Reign of Acrogens . . . . . 26 



Flora of the Carboniferous Epoch . . .36 



Flora of the Permian Epoch . . . .71 



Fossil Flora of the Secondary or Mesozoic Period . 72 



Reign of Gymnosperms . . . . .72 



Flora of the Trias and Lias Epochs . . .77 



Flora of the Oolitic Epoch . . . .80 



Flora of the Wealden Epoch . . . . 84 



Fossil Flora of the Tertiary or Cainozoic Period (includ- 

 ing the Cretaceous Epoch) . . . .87 



Reign of Angiosperms . . . . .87 



Flora of the Chalk . . . . .87 



