24 MR. W. MITTEN—BRYOLOGIA OF THE SURVEY 
O. STRANGULATUM, Beauv. 
Hab. Cascade Mountains, British Columbia, Lyall, 
O. ANOMALUM, Hedw. 
Hab. Saskatchewan, Bourgeau. 
O. speciosum, Nees. 
Hab. On rocks near Fort Colville, Lyall. 
. O. ELEGANS, Schw. 
Hab. Pend Oreille River, and between that and Kootenay River, 
British Columbia, Lyall. 
The smooth capsule and rather more slender habit seem to be 
the only differences between this and the preceding; both forms 
are found in Europe. 
Very large specimens of what appears to be the same as the 
European O. Lyellii, Hook., were gathered by Menzies on the 
N.W. coast of America, and were marked by Sir W. Hooker 
* O. Menziesii," but were never published ; there is a great differ- 
ence in the external look of the specimens, but no appreciable 
distinction. 
O. coNsiMILE. Monoicum, pulvinatum, humile, foliis patentibus e 
basi ad insertionem angusta inde dilatatis ovato-lanceolatis nervo 
carinatis, marginibus recurvis reflexisve, cellulis basi paucis oblongis 
quadratisque superioribus rotundatis, perichetialibus conformibus, ` 
theca in pedunculo brevi exserta ovali siccitate plicata, operculo conico 
acuminato brevirostro, peristomio dentibus 8, ciliis simplicibus æqui- 
longis 8 interpositis, calyptra plicata ramentosa. 
Hab. Vancouver Island, on trees, Lyall. 
Closely resembling O. Columbieum, but with shorter lave: It 
is also allied to O. pulchellum, Sm., a species of which the position 
has not been well understood, it being sometimes placed in Ulota; 
but it agrees with the smaller species whieh correspond nearly 
with O. speciosum, Nees, and is truly an Orthotrichum. 
O. CorvuMBICUM. Monoicum, pulvinatum, humile, foliis e basi brevi 
oblonga erectiore longe lanceolatis patentibus apice latiuscule acutis 
nervo percurrente carinatis, marginibus reflexis, cellulis basi paucis 
elongatis superioribus subrotundis, perichztialibus brevibus, theca in 
pedunculo brevi exserta ovali-cylindracea siccitate plicata, peristomio 
dentibus 8, ciliis zquilongis 8 simplicibus alternantibus, calyptra 
plicata apice rugosa nuda. 
Hab. Vancouver Island, on trees, Lyall. 
In general appearance similar to O. Tasmanicum, Hook. f. et 
Wils., but rather less. 
