XII. C, 4 
Bi'own, and Yates: Volcano Island 
197 
difficulty. When Gates mentions the occurrence of tree vegeta- 
tion he evidently refers in almost all, or in all, cases to a dis- 
tributional stage in which the trees are scattered. 
While some of Gates’s statements are inexact, we believe that 
with the help of his pictures and a knowledge of the present 
vegetation of the island we have interpreted them correctly. 
Text fig. 2, a map taken from Gates’s paper, shows the areas in 
