30 MR. W. MITTEN—BRYOLOGIA OF THE SURVEY: 
Mnivum, Linn. 
M. INSIGNE, Mitten. 5 
‚Hab.. Vancouver Island, Wood and Lyall; British Columbia, Lyall. 
M. MEDIUM, B. et S. 
Hab. Pend Oreille and Pack Rivers, Fort Colville, and Cascade Moun- 
tains, Lyall. 
M. AFFINE, Bland. ` 
`. Hab. Saskatchewan and Rocky Mountains, Bourgeau. 
M. vENUSTUM, Mitten. 
Hab. Vancouver Island, Lyall. 2 
M. cUSPIDATUM, Hedw. 
Hab. Saskatchewan, Bourgeau. 
. M. SPINULOSUM, B. et S. 
Hab. Fort Colville, Lyall. 
` M. UMBRATILE, sp.nov. Dioicum, foliis laxis patentibus, inferioribus 
minoribus oblongis ovalibusque plus minus acutis integerrimis margi- 
natis, superioribus elliptico-oblongis apiculo parvo terminatis, basi 
longe decurrentibus, marginibus breviter duplicato-serratis, nervo per- 
currente, cellulis omnibus rotundatis parietibus grossiusculis, perichse- 
tialibus pluribus interioribus brevioribus lanceolatis, exterioribus elon- 
gatis, caulinis angustioribus, theca in pedunculo pallide rubro hori- 
zontali oblongo cylindracea basi attenuata curvata, operculo pallido 
conico acuminato, ceterum M. serrato simillimum. 
Hab. ** Mountain Rocks, Second point of Wood, Portage River," Drum- 
mond ; Galton Mountains, British Columbia, Lyall. 
In appearance altogether like M. serratum, Brid., and with fo- 
liage, as in that species, contorted and shrinking away when dry, 
but in its dioicous inflorescence allied to. M. orthorhynchum, Brid., 
which was mixed with Drummond's specimens of his Brywn margi- 
natwm, no. 259; differing, however, from this in its softer leaves 
with cells four times as large, and also from M. riparium, Mitten 
(M. lycopodioides, Bryol. Europ.), which has its cells bei half. as 
large, and the comal leaves long and narrow. 
Timma, Hedw. 
T. MEGAPOLITANA, Hedw. 
Hab. Vancouver Island and Galton Mountains, British Columbia, ia ; 
Saskatchewan, Bourgeau. 
TP. Austriaca, Hedw. ` 
Hab. Cascade Mountains and Pack River, British Columbia, Lyall. 
