CONTENTS. 



Page. 



Introduction • "^"^ 



Historical review of opinion 406 



Nature and extent of tlio Laramie group 433 



Vegetation of tlio Laramie age 436 



Explanation of the table of distribution 440 



Table of distribution of Laramie, Senonian, and Eocene plants 443 



Discussion of the table of distribution 515 



Recent collections of fossil plants from the Laramie group - 530 



Collections from the Lower Laramie strata 537 



Collections from the Fort Union group 54-2 



List of species illustrated 54'J 



Illustrations 559 



GEOL 2G 401 



