while the ae rf I! ‘alime 
are not known to be sexual in character. A single fertile Hal- 
meda plant, ike those collected on July 1, must produce a colossal 
multitude of microscopic zodspores and it is conceivable that 
a single fertile plant out of thousands of permanently sterile 
n the afternoon of July 6 we went to Ponce by stage and rail 
and met the “Canario” in Ponce Harbor early the SS 
morning, with the intention of sailing out to the island kno 
e 
uertos was wisiicd by yee last eit oud ee Beams Ee) caused 
described by you 
topographical and floral features of this attracti din feresnne 
island. The algal flora of the island was found to be rich and 
varied. A striking feature of this flora along the northwestern 
shores was the abundance of Cymopolia barbata, an attractive, 
more or less calcified green alga that I have elsewhere seen in 
only limited quantity. It was here growing profusely in shallow 
often growing attached to its darker-colored and differently 
organized relative, Avrainvillea Rawsoni. In the afternoon, on 
* Jour. N. Y¥. Bot. Gard. 16: 109. 1915. 
