LETTER OF TRANSMITTAL. 



Columbus, Ohio, September 30, 1882. 

 Dr. F. V. Hayden, Fhiladelphia. 



Dear Sir : I send herewith the manuscript of the eighth volume of the 

 Reports of the United States Geological Survey of the Territories, made 

 under your direction. Besides a short introduction, this volume contains : 



1st. A review of the Cretaceous Flora of the Dakota Group, or of 

 what has been published in volume VI, with descriptions of a large num- 

 ber of new and remarkably interesting species illustrated by 17 plates. 



2d. Some remarks on the Flora of the Laramie Group, which I consider 

 as Eocene, with descriptions of a few new species, illustrated by 3 plates. 



3d. The more valuable part of the volume, viz: the descriptions of 

 the plants of the Oligocene, a flora of which little was known before, and 

 which is now richly represented by a large number of specimens, especially 

 from Florissant, Colorado. This Flora will be quite as well received by 

 paleontologists as has been the Cretaceous Flora of volume VI. It is 

 illustrated by 24i plates, which are all very finely made. 



4th. Half of one plate serves for illustrations of a few plants from 

 the oldest Pliocene, or upper Miocene of California. 



5th. Descriptions with figures of Miocene plants of the Bad Lands, 

 with 5 plates. The plants, clearly of Miocene type, are very interesting 

 from their relation to species of the Arctic Flora. 



6th. Descriptions of species of Miocene plants of California and Oregon 

 from specimens pertaining to the State Museum of Oakland, California. 

 They are illustrated by 10 plates, the whole number of the plates being 60. 



7th. A short account and description of new species found in a collec- 

 tion of fossil plants made in Alaska by W. H. Dall, of the United States 



