219 
Oakesianus, P. epihydrus, Acer carolinianum, Vaccinium atlan- 
ticum, Aronia atropurpurea, and Iris sli At the contact 
are Solidago sempervirens, Argentina ao ee maritima, 
and other salt marsh species.” 
is excursion to Merrick completed the arranged program in 
connection with the Twentieth Anniversary of the New York 
Botanical Garden 
MarsHaAtit A. Howe, 
Secretary of the Twentieth Anniversary Meetings 
REPORT ON A VISIT TO PORTO ae FOR COLLECT- 
ING MARINE ALGA 
Dr. N. L. Brirron, DirEcTor-IN-CHIEF, 
Dear Sir: I beg to present herewith a brief account of a recent 
first visit to Porto Rico for this purpose was in the summer of 
1903 and was briefly reported upon in the Journal of the 
New York Hilanea) Garden for October of that year. The 
second was in February and March, mide when I had the pleasure 
of accompanying you and others on an expedition of a wider 
for May, 1906. The present expedition was u the leader- 
ship of Dr. Raymond C. Osburn, of C ia University, and 
was one the several recently organized b 
° 
Academy of Sciences, the American Museum of Natural History, 
and the New York Botanical Garden, with the financial codpera- 
tion of the insular govern nment of Porto Rico, for the object of 
are ver rey common ae found atiacned to marine algae, so that our 
natural and mutually 
beneficial. It fae doubtless been too miticl the custom for 
specialists in marine botany to “flock by themselves’? when 
