164 
destroying species of fungi which in turn have caused the trees 
to rot and fall to pieces. The epiphytes thus brought to the 
ground have completely covered the floor of the hammock and 
have now taken possession of the smaller trees which appear to 
be doomed to the same fate which overtook the larger ones. 
J. K. Smarty 
Curator of the Museums and Herbarium. 
paca OF MARINE ALGAE FROM 
LORIDA AND THE BAHAMAS. 
Dr. N. L. Brirron, Drrector-In-CuI£r : 
As a supplement to your report relating to our expedition to 
southern Florida and the Bahamas in March and April, I would 
respectfully submit a brief account of my special work in connec- 
tion with collecting and studying the marine algae of that region. 
I wasin Miami, Florida, for a single day, on October 22, 1902, 
on my way to Key West, and when we reached this point on 
March 17, 1904, it was of interest to note that several species of 
algae, eee! two sansa of Acetabulum and one of Coccocladus 
which were very abundant on the former visit, were now — six 
months ame in the year — equally abundant and in practically 
the same stages of development. Very little is definitely known 
about the life-periods and seasonal variations of the marine algae 
of our subtropical waters and the opportunity of comparing the 
marine flora of this locality in spring and autumn was a valued one. 
An impressive feature of the marine vegetation of the main- 
land shore of Biscayne Bay is the profusion in which the graceful 
Acetabulum crenulatum: occurs. When I have met with this 
species elsewhere — in Bermuda, Key West, Porto Rico, and the 
Bahamas — it has been rather sporadic and in limited quantity. 
Here, it often covers areas twenty feet or more in diameter to the 
exclusion of nearly everything else, mostly in water that is from 
one to six feet deep at low tide. 
The visit of three or four days to Cutler, fifteen miles south of 
Miami, did not result in the collection of much that was different 
