134 
one of certain species of itt but I have not been able 
to find either zodspore: metes. As far as I have been able 
o find, it propagates oe ae by deciduous thin-walled 
cells (propagating akinetes) and very thick walled resting akin- 
Behind the Bath a brook has excavated a narrow valley with 
steep walls, resembling a canyon. m the leaves of several 
species of trees in this valley there was found a rich epiphyllous 
vegetation of Cephaleuros and Phycopeltis with all transitions 
to lichen gonidia. 
Among the longer expeditions which were undertaken from 
rich vegetation of Chlor ceae, consisting o ithophora, 
Cladophora (swaying in the as of the river), Oedogo ; 
ougeotia, an rogyra. small po re fe 
masses of sli of Anabaena - Tetraspora, and not a few 
esmids. 
Characeae were found at several places in the Coamo River. 
In the town of Caguas I stayed from January 15 to 20 and 
collected algae at several places. In the very streets of the 
river near the town there is a rather rich vegetation of Chloro- 
phyceae on the water plants, besides the Myxophyceae found 
everywher Id u ear the river exhibited an unusual 
far as I can decide, by a preliminary examination, it is the same 
awe as I have collected again and again, also on old cow dung, 
n the Norwegian high mountains. 
s it was of interest to find how the alga-vegetation would 
present itself in a syenite region, I went to the town of San 
Lorenzo. On the way I had achance to collect a multitude of 
aerophilous Myxophyceae on rock and dirt-declivities, Com- 
