EXPLANATION OF THE ILLUSTRATION 
Pirate II]. Pontureva srcornuta C. Schweinfurth. 
1, plant, one half natural size. 2, flower, ex- 
panded, three times natural size. 3, column and 
lip from side, natural position, three times natural 
size, 4, lateral sepal, three and one half times nat- 
ural size. 
Drawn by Dorotuy H. Marsn 
