270 NOVA SCOTIAN MOSSES—-SOMERS., 
ence between it and the description and plate of the British 
species in Berkley. My friend, A. H. McKaye, of Pictou, has 
found C. Americanum, and thinks all our species are of the lat- 
ter form. 
C. dendroides has been described as occurring in British 
Columbia and eastern slope of Rocky Mts. 
SEcT.—Acrocarpi. 
OrpD.— Bartramiei. 
GEeN.—Bartramia. 
Bartramia, ithyphylla, Brid. 
Leaves from a sheathing base ; lanceolate, rigid, strong nerved, 
stem dichotemous ; sporangium oblique. July, 1880; on granite 
in elevated places, near Halifax. 
Orp.—Bryei. 
Gev.—Mnium. 
Mnium, rostratum, Schwog. 
Stems erect, simple; lower leaves ovate or rounded; upper 
oblong, obtuse, with an apiculus; margined; simply toothed ; 
fruitstalks aggregated ; sporangium oval, pendulous; lid rostrate, 
very handsome, Growing on sandstone, margins of shady brooks ; 
rire, SL, 
Orp.—Tetraphidei. 
GEN. 
Trematodon, Hdw. 
Trematodon, ambiguus, Hedw. 
Stem short; seta 1 inch, with an apophysis peristorme of 16 
lanceolate teeth cleft, but apparently cohering by fine trans- 
verse articulations ; operculum rostrate, calyptra; cucullate long 
beaked ; leaves oblong, acuminate, concave margins; entire 
nerve strong excurrent ; cells large, oblong at the base ; crowded 
above. Hx., Sept., 1880. — Not described in Berkley’s book, 
An European but not a British species. A, H. McKaye, to whom 
I submitted specimens, diagnosticated it as above. Not described 
in Sullivant’s Icones., and rare in U.5.; only other Canadian 
locality, so far given, Kent County, N. B,, where it was found 
by James. 
