yiii 



CONTENTS. 



CHAPTER VII. 



PAGE 



Plants from the Tertiary to the Modern Period . . .219 



CHAPTER VIII. 



General Laws of Origin and Migrations of Plants — Relations 

 of Recent and Fossil Floras 237 



APPENDIX. 



I. Comparative View of Paleozoic Floras .... 273 



II. Heer's Latest Statements on the Greenland Flora . .281 



III. Mineralisation of Fossil Plants 284 



IV. General Works on Paleobotany 286 



