CONTENTS: 
Philippine Mosses, by Ropert 8. Witttams. [Issued separ- 
ately, in advance, July 23,1914.) . . . - 331 
The Vegetation of Vieques, by Percy Witson. [Issued sep- 
arately, in advance, June 9, 1917.) . P : . 379 
GENERAL INDEX. . . . ) .) OO OI 
Generic INDEX . 8 8 : : ; . . 420 
