42 MR. W. MITTEN—BRYOLOGIA OF THE SURVEY 
In large interwoven patches of a dull-green colour. In general 
appearance very similar to that form of H. cupressiforme known 
as “ tectorum,” but its affinity is in other respects with H. reptile, 
Mich., in the form and especially the substance of its leaves, and 
in the plication of those of the perichetium ; but the present 
species is certainly dioicous, more robust, and with scarcely serru- 
late leaves. 
S. CIRCULARIS, sp. nov. Caule rufescente fastigiate ramoso, folus 
secundis circinatis ovato-lanceolatis apice angustis acutis, breviter 
binervatis marginibus basi tantum subserrulatis, cellulis ad angulos 
paucis abbreviatis subobscuris flavidis, superioribus elongatis latitudine 
1 (oar: 1919... ‘ i ci 
8099 longitudine -gp circiter uncize metientibus pellueidis. 
Hab. Beechey Island and Wellington Channel, Lyall. 
Pale yellowish green slightly tinged with brown. Stems one 
or two inches high; branches irregularly disposed, fastigiate ; 
leaves all circinate, and so closely directed to the ventral side of 
the stem as to be laterally compressed. In general appearance 
and size nearest to H. callichrown, Brid., but the areolation of the 
base of the leaf is different. 
(Limnobium, Schimp.) 
S. OBTUSIFOLIUS, Hook. et Wils. 
Hab. Poseidon River, Lyall. 
A few specimens, all without fruit. 
S. ARCTICUS, Sommerf. 
Hab. Rocky Mountains, Lyall. 
S. OCHRACEUS, Turner. 
Hab. Cascade Mountains, British Columbia, Lyall. This moss is 
found also in Davis’s Straits; and a few fragments of S. turgescens, 
Schimper, were also obtained there by Mr. Taylor. 
(Cuspidaria, C. Müller.) 
S. SCHREBERI, Willd. 
Hab. Saskatchewan, Bourgeau. 
This species does not well range here. 
S. cusPIDATUS, Linn. 
Hab. Pack River, Lyall. 
S. RICHARDSONI, sp. nov. Monoicus, cxspitosus, ramis inordinatim 
pinnatis apice cuspidatis, foliis patentibus late ovatis apice rotundatis 
obtusis concavis integerrimis nervo medio evanido, ramulinis oblongo- 
lanceolatis obtusis, cellulis elongatis apicibus prominulis alaribus laxis 
wentricosis pallidis, perichztialibus ovalibus acutis levibus imbricatis 
