OF THE FORTY-NINTH PARALLEL OF LATITUDE. 89 
STEREODON, Brid. 
(Plagiothecium, Schimp.) 
S. PULCHELLUS, Hedw. 
Hab. Fort Colville, Lyall. 
These specimens correspond with authentic examples of S. pul- 
chellus of the * Bryologia Europea.’ But it appears very difficult to ` 
assign any constant character to S. nitidulus, viewed as a distinct 
species; for, besides these forms, there is a third, collected in 
Davis’s Straits by Mr. Taylor, and also creeping amongst some of 
Drummond’s specimens of Webera longicolla; it has its leaves 
about half as wide again as in S. pulchellus, but no other decided 
difference. 
S. TURFACEUS, Lindbg. 
Hab. Fort Colville, British Columbia, Lyall. 
This very distinct species will doubtless in time be found in 
British North America. 
S. GEMINUS, sp. nov. Monoicus, ramis assurgentibus intertextis, foliis 
ovatis ovato-acuminatisque patulis varie decurvis subsecundis sub- 
falcatisve marginibus minute serrulatis subintegerrimisve nervis latis 
usque ad medium productis, cellulis angustis elongatis basi paucis 
brevioribus, perichetialibus erectis internis longioribus latis breviter 
acuminatis, theca in pedunculo elongato ovali-cylindracea suberecta 
collo sensim attenuato, peristomio interno processibus angustis ciliis 
binis subzequilongis interpositis. 
Hab. Rocky Mountains, alt. 6000-8000 feet, associated with S. pul- 
chellus and Mnium umbratile, Mitten, Lyall. 
Somewhat similar to S. pulchellus, Hedw., but with leaves 
more gradually narrowed from a wider base, the thin but wide 
nerves continued to about the middle, the margin more or less 
evidently serrulate from the base to the apex, and the cells only 
half as long and narrower. 
S. Dontanus, Sm. 
Hab. Fort Colville, Lyall. 
S. uNDULATUS, Hedw. 
Hab. Fort Colville, Lyall. 
(Orthothecium, Schimp.) 
S. CHRYSEUS, (Hypnum chryseon) Hornsch. 
Hab. Rocky Mountains, Bourgeau and Drummond, no. 221. 
This species has been brought from Beechey Island, Wellington 
Channel, and Pond’s Bay, in Arctic America, by Dr. Lyall, but, 
excepting Drummond's specimens, all are without fruit. 
