XIV LETTER OF TRANSMITTAL. 



prepared by Prof. Lester F. Ward for his own use, but he has kindly con- 

 sented to permit their publication as an appendix to this memoir. Their 

 preparation involved an immense amount of research and comparison, and 

 their comprehensiveness and accuracy will add greatly to the value of my 

 work. 



Respectfully submitted, 



Wm. M. Fontaine. 



Hon. J. W. Powell, 



Director U. 8. Geological Survey. 



