LETTER OF TRANSMITTAL. 



Department of the Interior, 



United States Geological Survey, 



Washington, D. G, June 30, 1896. 

 Sir: I have the honor to transmit herewith the manuscript of Part II 

 of a monograph on the Geology of the Yellowstone National Park. It 

 embraces chapters on the descriptive geology of the mountains surrounding 

 the Park Plateau, by myself and colleagues; elaborate investigations of 

 the petrography of the crystalline rocks, by Prof. J. P. Iddings; reports 

 upon the invertebrate paleontology of the Park and the Absaroka Range, 

 by Messrs. C. D. Walcott, George H. Girty, and T. W. Stanton; and an 

 exhaustive study of the fossil flora of the region, by Mr. F. H. Knowlton 

 Very respectfully, 



Arnold Hague, 



Geologist in Charge. 

 Hon. Charles D. Walcott, 



Director United States Geological Survey. 



