106 Rhodora JUNE 
GLoEOCAPSA SP.? This form seems to be near G. alpina (Naeg.) 
Brand, but cannot, as yet, with any show of assurance be designated 
as the same. Its identity may best be held in question pending a 
further comparison with exsiccatae. Locally abundant. Eagle Pass 
Mountains: with Trentepohlia aurea on rocks near the mouth of Cañon 
Creek at 2000 feet. Selkirk Mountains: also among T. aurea on rocks 
by a small stream tributary of Quartz Creek at 3000 feet, and with G. 
magma above the head of Fish Lake at 5200 feet. i 
GOMPHOSPHAERIA APONINA Kuetz. Eagle Pass Mountains: not 
uncommon among Nostoc, etc., cliffs at the falls of Jordan Creek, 2000 
feet. 
HYPHEOTHRIX CALCICOLA (Ag.) Rabenh.? The collections agree 
fairly well with this species in most characters, but showed differences 
in manner of growth. Eagle Pass Mountains: cliffs by Jordan Creek 
near the Falls, 2000 feet, and between Jordan Creek and the Big 
?ddy of the Columbia River, 1800 feet. Selkirk Mountains: Cascade 
summit path at 5500 and 6000 feet, and near the foot of the Illecille- 
waet Glacier at 4500 feet. Also wet rocks above the head of Fish Lake 
at 5200 feet, by Quartz Creek at 5700 feet and in a pool east of the 
stream at 6700 feet. 
MERISMOPEDIA GLAUCA (Ehrb.) Naeg. Occasional colonies among 
other algae. Eagle Pass Mountains: wet rocks between Jordan Creek 
and the Big Eddy of the Columbia River. Selkirk Mountians: pools 
above the head of Fish Lake at 5200 feet and in the pass at the source 
of Quartz Creek, 6500 feet; also in pools east of the valley at 6700 feet. 
MicROCOLEUS PALUDOSUS (Kuetz.) Gomont. Selkirk Mountains: 
banks of pools in the pass at the source of Quartz Creek, 6500 feet, 
abundant with Nostoc. 
MicnocoLEUS VAGINATUS (Vauch.) Gomont. Selkirk Mountains: 
pass at the source of Quartz Creek, 6500 feet, scarce, in scum in stand- 
ing pools. 
Nostoc coMMUNE Vauch. Colonies of Nostoc in various stages of 
development were present in over a third of the collections made, 
and the younger stages could not be identified with certainty. The 
more mature colonies seemed generally to agree in measurements with 
the above, but it is probable that other species are represented, the 
distinctness of which was not recognized. Found in all districts vis- 
ited, often being the dominant alga. 
Nosroc MACROSPORUM Menegh. Eagle Pass Mountains: cliffs at 
the falls of the Jordan, 2000 feet. 
NosToc MricROSCOPICUM Carm. With the above. 
OSCILLATORIA AMOENA (Kuetz.) Gomont. Sometimes growing in 
pure masses. Selkirk Mountains: on moss or rocks. Cascade Summit 
trail at 5000 and 6000 feet, a runnel near the Glacier House at 4000 
feet and near the foot of the Illecillewaet Glacier at 4500 feet. 
