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No. 165. Central American Mosses, by Elizabeth G. 
Britton and R. S. Williams. 
No. 166. Studies of Plant Growth in Heated Soil, by 
Guy West Wilson. 
No. 167. The Identity of the Anthracnose of Grasses 
in the United States, by Guy West Wilson. 
No. 168. Phytogeographical Notes on the Rocky \oun- 
tain Region—II. Origin of the Alpine Flora, by P. A. 
Rydberg. 
No. 169. Some Midwinter Algae of Long Island Sound, 
by Marshall A. Howe. 
No. 170. Notes on Rosaceae—VII, by P. A. Rydberg. 
No. 171. A Revision of the Genus Vittaria J. E. Smith, 
by Ralph C. Benedict. 
No. 172. Phytogeographical Notes on the Rocky Moun- 
tain Region—III. Formations in the Alpine Zone, by 
P. A. Rydberg. 
No. 173. Notes on Rosaceae—VIII, by P. A. Rydberg. 
Lectures 
Pusuic LEcTURES 
Illustrated public lectures on botanical subjects have 
been given in the museum building on Saturday afternoons 
from April to the middle of November, as outlined below. 
The total attendance for the year has been 3,264, averaging 
99 for each of the 33 lectures; the maximum attendance 
being 215 on September 26. 
April 4. ‘‘An Excursion through the United States with 
Distinguished Foreign Botanists,” by Dr. G. E. Nichols. 
April 11. ‘‘The Occurrence and Significance of Varia- 
tion in Plants,” by Dr. A. B. Stout. 
April 18. “‘The Seaweeds of New York City and 
Vicinity,” by Dr. \I. A. Howe. 
April 25. ‘“‘The Petrified Forest of Arizona,” by Dr. 
Arthur Hollick. 
May 2. ‘Some Interesting Trees Seen on My Travels,” 
by Dr. W. A. Murrill. 
