LETTER OF TRANSMITTAL. 
U. S. DEPARTMENT OF AGRICULTURE, 
DIVISION OF BOTANY, 
Washington, D. C., December 20, 1895. 
Sir: I have the honor to transmit herewith for publication Volume 
ILI, No. 7, Contributions from the United States National Herbarium, 
consisting of the final part of a preliminary revision of the North 
American species of Cactacez. 
Respectfally. 
FREDERICK V. CovVILLE, 
Botanist. 
Hon. J. STERLING MORTON, 
Secretary of Agriculture, 
WW 
