NumbBer 7 (April 17, 1946) 
New and interesting Mexican Orchids 
By Louts O. WILLIAMS 
Two Orchids from Haiti 
By Louis O. WILLIAMS 
NumBer 8 (October 25, 1946) 
Races of Maize in South America 
By Huau C. Curher 
Numser 9 (December 27, 1946) 
Rubber Production in Ceara, Brazil 
By Huau C. CurLer 
NuMBER 10 (July 18, 1947) 
A Conspectus of the Genus Cunuria 
By J.T. Batpwin, Jr. AND 
RicHarp Evans SCHULTES . 
[ vi ] 
301 
B25 
