110 Rhodora [JUNE 
the axis, not frequent. Cells reaching 50 9. diameter in the main axis 
though generally 25 à. to 30 y, and in the branches about 20 u. Length 
of the cells generally one and one-half times to twice the diameter, 
reaching three times in the branches, rarely shorter. Wall generally ` 
thick, attaining 3 à in the main axis. 
Notable in this species are the sharp bends in the filaments where 
frequently arise branches, one to three in number, which when short 
are tapering and nearly straight, but when they elongate are flexuous, 
angled and themselves branched. "The large diameter and thick 
cell-wall of some filaments is also characteristic. Selkirk Mountains 
abundant in running water, in the pass at the source of Quartz Creek, 
at 6500 feet. 
SCENEDESMUS BIJUGA (Turp.) Lagerh. Rare, mixed with other 
algae. Eagle Pass Mountains: in a rivulet at 6000 feet. Selkirk 
Mountains: in pools east of Quartz Creek valley at 6700 feet. 
SCENEDESMUS OBLIQUUS (Turp.) Kuetz. Selkirk Mountains: in 
a pool with the above form. 
SprroGyra: This genus appeared comparatively seldom, but was 
seen in sterile condition in the Eagle Pass Mountains and in the 
Selkirk Mountains near Glacier. 
TETRAEDRON MINIMUM (A. Br.) Hansg. Selkirk Mountains: in 
pools above the head of Fish Lake at 5200 feet; rare. 
TETRASPORA LUBRICA (Roth) Ag. Selkirk Mountains: in the valley 
below the Asulkan Pass at about 5000 feet, among filamentous algae. 
Urorunix: Only seen in Cañon Creek on Stigonema mammilosum 
and not sufficiently well preserved to be identified. 
ZYGNEMA CYLINDRICUM Trans. Selkirk Mountains: Loosely at- 
tached to rocks, Cascade Summit trail at 5500 feet. With very abun- 
dant aplanospores. Sterile Zygnema appeared frequently in all 
districts visited. 
FLAGELLATAE. 
Hyprurus Foetipus (Vill) Kirchn. Selkirk Mountains: rocks in 
a stream near the foot of the Illecillewaet Glacier and in rivulets 
flowing into Quartz Creek, in abundance at 5000 and 5700 feet. It 
was also abundant in rivulets feeding Lake Louise in the Canadian 
Rocky Mountains. 
RHODOPHYCEAE. 
BATRACHOSPERMUM MONILIFORME Roth. Eagle Pass Mountains 
in a rivulet entering Cafion Creek near the Jordan Creek Trail, at 
2200 feet. Selkirk Mountains: on sticks in a small stream tributary 
to Quartz Creek at 3000 feet. In good fruit at both places. 
Funai ? 
CHIONASTER NIVALIS (Bohlin) Wille. Eagle Pass Mountains at 
7000 feet in the “Red Snow." First reported by Bohlin from Lap- 
