isr o T E . 



Department of the Interior, 



United States Geological Survey, 



November 1, 1883. 

 On the 27th of September, 1882, at the request of Dr. F. V. Hayden, 

 the completion of the pubhcations of the United States Geological and 

 Geographical Survey of the Territories, formerly under his charge, was 

 committed to the charge of the Director of the Geological Survey by the 

 following order from the honorable the Secretary of the Interior: 



Department of the Interior, 



Washington, September 27, 1882. 

 Maj. J. W. Powell, 



Director U. S. Geological Survey, City: 

 Sir : The letter of Prof. F. V. Hayden, dated June 27, bearing your 

 indorsement of July 20, relating to the unpublished reports of the survey 

 formerly under his charge, is herewith returned. 



You will please take charge of the publications referred to in the same, 

 in accordance with the suggestions made by Professor Hayden. 



It is the desire of this office that these volumes shall be completed 

 and published as early as practicable. 

 Very respectfully, 



H. M. TELLER, 



Secretary. 



Of the publications thus placed in charge of the Director of the 

 Survey, the accompanying volume is the second to be issued. The first 

 was entitled "The Vertebrata of the Tertiary Formations of the West, by 

 Edward D. Cope." On the 12th day of October, 1882, the manuscript of 

 the present volume was received at the office of the Geological Survey, and 

 through the hearty co-operation of Professor Lesquereux, the work has 

 been pushed to rapid completion. The volume is an important contribu- 

 tion to the ancient botany of North America, and will be heartily welcomed 

 by paleontologists. 



VyV^TYY^OJU 



Director. 



