(13) 
in Panama during March; the exploration of parts of Ari- 
zona, Sonora, California, and Lower California, by Dr. D. 
T. MacDougal, Assistant Director, in March and April; 
the visit of Dr. W. A. Murrill, Assistant Curator, to Cuba in 
March, with the special object of the study of fungi in co- 
operation with Professor F. S. Earle, Director of the Cuban 
Agricultural Experiment Station ; the exploration of Bermuda 
by myself, accompanied by Mrs. Britton and by Mr. 
Stewardson Brown of the Academy of Natural Sciences of 
Philadelphia, carried out during September; the examination 
of the western end of the Great Bahama Island by Mr. L. J. 
K. Brace, special agent, during May; the work of Dr. J. 
N. Rose, of the U. S. National Museum, in South Mexico, 
with the special object of increasing our knowledge of 
cactuses; the further exploration of the Island of Haiti by 
Mr. Geo. V. Nash, assisted by Mr. Norman Taylor, during 
July and August; the exploration of little known parts of 
the state of Utah, conducted by Dr. P. A. Rydberg, As- 
sistant Curator, in June, July and August; the work of Dr. 
W. A. Murrill, Assistant Curator, in the study of fungi in 
Maine, with Mr. P. L. Ricker of the U. S. Department of 
Agriculture, and the continuation of the Bahamian explora- 
tion during December on Fortune Island and adjacent islands, 
by Mr. L. J. K. Brace, which is still in progress. 
It will be seen that more attention has been given to the 
West Indies than to any other region during the year, and the 
value of the material secured from there makes it evident 
that operations in this field may well be continued at every 
available opportunity. 
Investigations 
The study of the collections has gone forward by members of 
the staff and assistants, and by fifty-three registered students, 
as well as by many visitors from other gardens and museums 
and from colleges or other educational institutions. The rec- 
ord of work accomplished will be found in the reports of the 
several officers, and that of students is given in detail in the 
report of the Assistant Director. The appropriation for the 
