CONTENTS. 
No. 1. 
An Enumeration of the Plants Collected in Bolivia by 
Miguel Bang.—III. By Henry H. Rusby. (Issued 
1896) 
NU X 
A Revision of the North American Isotheciaceae and Brachy- 
thecia. By Abel Joel Grout. (Issued July 30, 1897. 
: NO. 3. 
The Life History of Sphaerella lacustris ( Haematococcus 
pluvialis). Plates 86, 87. By Tracy Elliot Hazen. 
(Issued May 8, 1899).... ......-- 
No: 4- 
A Review of the Genera of Ferns proposed prior to 1832. 
By Lucien Marcus Underwood. (Issued December 
1, 1899) 
No. 5. 
Notes on Lichen Distribution in the Upper Mississippi Val- 
ley. By Bruce Fink. (Issued December 1, 1899)... 
PAGES 
I=—130 
131—210 
211-246 
247-283 
285—306 
