LETTER OF TRANSMITTAL. 



Department of the InterioRj 

 United States Geological Survey, 



Washington, D. C, October 10, 1898. 

 Sir: Herewith I transmit a monograph of the fossil flora of the Lower 

 Coal Measures of Missouri. As the first comprehensive presentation of the 

 flora of any zone of the Coal Measures in the trans-Mississippi region, it 

 offers important data for the comparison and correlation of these beds with 

 the Eastern coal fields, and it also furnishes ciiteria that will be of value in 

 the comparison of other neighboring Coal Measures areas and in the estab- 

 lishment of the floral sequences tlu-ough the various zones of the Upper 

 Carboniferous in the Western Interior Basin. 

 Very respectfully, 



David White, 



Assistant Geologist. 

 Hon. C. D. Walcott, 



Director United States Geological Survey. 



