104 | Rhodora | JUNE 
with olive-green rounded patches. On one rock Phormidium autuni- 
nale produced-a strongly contrasting blue-green expanse. The stones 
in a little stream flowing into the lake were found by Dr. Jacobs to 
be covered with little green streamers which on examination proved 
to be the interesting Prasiola fluviatilis. One patch of “Red Snow" 
'as encountered near the end of the climb in the Eagle Pass Moun- 
tains. Samples were melted, allowed to settle, and the sediment pre- 
served. It was found to be composed of spherical cells, probably 
Chlamydomonas nivalis, and the peculiar stellate organism, Chionaster 
nivalis, described by Bohlin!, ?, from Lapland. 
The writer desires to acknowledge with thanks the help of all mem- 
bers of the party in securing material; the advice and assistance of 
Dr. M. A. Howe and Dr. N. L. Gardner, the kindness of Dr. E. N. 
Transeau in verifying the determinations of Mougeotia calcarea and 
Zygnema cylindricum, the determination of Chionaster nivalis by Dr. 
Tracey E. Hazen, and the opportunity given by Dr. C. W. Dodge 
for comparing certain specimens with exsiccatae in the Herbarium of 
the Cryptogamic Laboratory of Harvard University. 
List OF SPECIES 
MYXOPHYCEAE 
ANABAENA FLOS-AQUAE (Lyngb.) Bréb. Eagle Pass Mountains: 
among other algae in a pond and among mosses in rivulet at 6000 
feet; rare. Selkirk Mountains: little pools above the head of Fish 
Lake, 5200 feet. 
ANABAENA INAEQUALIS (Kuetz.) B. & F. Eagle Pass Mountains: 
occasional in rivulets and ponds at 6000 feet. Selkirk Mountains: in 
valley below Asulkan Pass, 5000 feet, and in pools in the pass at the 
head of Quartz Creek, 6500 feet. In one pool on the ridge east of 
Quartz Creek at about 6700 feet there occurred a slight “bloom ” of 
an Anabaena which lacked spores but which in measurements of 
vegetative cells and heterocysts agreed with this species. It was the 
only instance observed during the trip of a blue-green alga forming 
a "bloom." 
APHANOTHECE MICROSPORA (Menegh.) Rabenh. Eagle Pass Moun- 
tains: frequent on cliffs near the Falls of Jordan Creek at 2000 feet 
and in a pond at 6000 feet. Selkirk Mountains: pools in Quartz 
Creek valley at 5700 feet and near its source at 6500 feet, also at 
6700 feet in a pool on the ridge east of the valley. 
! Bohlin, K. Snéalger fran Pite. Bot. Notiser 1893 p. 46. 
2 Bohlin, K. Ueber Schneealgen aus Pite-Lappmark. Bot. Centralbl. 64: 42-45. 
