1922] Taylor,—Notes on some Algae 103 
such lower valleys patches of wet rock or moss frequently were partly 
covered with Phormidium Hetzii or in one instance Cylindrospermum 
majus. In the ravine below the Falls of Jordan Creek a series of 
dripping cliffs supporting a sub-alpine phanerogamic flora (Pinguicula 
etc.) showed a luxuriant growth of Nostoc commune and N. micro- 
scopicum with spherical colonies reaching a considerable size. "This 
alga was one of those most frequently found in damp situations. It 
was expected that the many small streams would show a rich flora of 
such genera as Lemanea and Batrachospermum, but the former was 
not detected and the latter was represented only by Batrachospermum 
moniliforme, which appeared but once in the Eagle Pass Mountains 
and once in the Selkirks. In the Selkirks when there was any promi- 
nent algal vegetation in the rapid streams, it appeared to consist of 
Hydrurus foetidus. The flora of the alpine pools was given special 
attention. Sometimes grass or mosses bordered the pool and lined 
its bottom almost to the exclusion of algae. On the other hand the 
edge among the grasses often showed a large quantity of Nostoc, mixed 
with Microcoleus paludosus. Again, in some the bottom was lined 
with a vigorous growth of Stigonema ocellatum. The floating masses 
of semi-decayed algae which filled many of the pools usually showed 
a predominance of Mougeotia, sometimes with a good deal of Zygnema. 
Mixed with this there appeared a variety of Myzophyceae, notably 
Scylonema myochrous and Tolypothrix lanata, various species of Chroo- 
coccus, of which Chroococcus turgidus was the most common, Phormid- 
ium laminosum, Pediastrum and Oocystis, an abundance of desmids 
(often with zygospores), diatoms, and fragments of such genera as 
Bulbochaete and Oedogonium which probably had matured earlier in 
the season. Examination of the many places where green masses of 
filamentous algae covered wet stones or filled little pools among the 
rocks, showed a predominance of Mougeotia with Zygnema also fre- 
quent, but Spirogyra only turned up in a few cases and was always 
sterile. A Ulothrix was attached to the tufts of Stigonema mammilo- 
sum on the rocks in the bed of Cañon Creek, but could not be identi- 
fied with sureness. The wet cliffs and rocks on the mountain-sides 
sloping toward the upper end of Fish Lake offered the best opportun- 
ity to study the flora of such a substratum among alpine surroundings. 
The predominant and showy types were Glococapsa magma, which 
colored the rocks dark red, and Stigonema informe which spotted them 
