OF THE FORTY-tfLtfTH PARALLEL OF LATITUDE. 39 



Stereodof, Brid. 

 (Plagiothecium, Schiinp.) 



S. pulchellus, Hedw. 



Hab. Fort Colville, Lyall. 



These specimens correspond with authentic examples of S.pul- 

 cliellus of the ' Bryologia Europaea.' 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 8. 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, perichaetialibus erectis internis longioribus latis breviter 

 acuminatis, theca in pedunculo elongato ovali-cylindracea suberecta 

 collo sensim attenuato, peristomio interno processibus angustis ciliis 

 binis subaequilongis mterpositis. 

 Hab. Rocky Mountains, alt. 6000-8000 feet, associated with S. pul- 



chellus and Mnium umbratile, Mitten, Lyall. 

 Somewhat similar to 8. 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. Donianus, Sm. 



Hab. Fort Colville, Lyall. 



S. undulatus, Hedw. 

 Hab, Fort Colville, Lyall. 



{Orthotheciunt, 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. 



