OF THE FORTY-NINTH PARALLEL OF LATITUDE. 33 
H. DEcLIvum, sp. nov. Monoicum, caule procumbente subpinnato, 
foliis subfalcatis lanceolatis sensim acuminatis, nervo medio evanido, 
marginibus serrulatis, cellulis omnibus elongatis angustis, pericheti- 
alibus e basi latiore recurvis enerviis, theca in pedunculo crassius- 
culo scaberrimo horizontali ovali inzequali, operculo conico, peristomio 
normali ciliis duobus appendiculatis 
Hab. Pend Oreille River, on Peltigera scutata and P. venosa, Lyall. 
A small, slender species, so nearly allied to H. velutinum, Dill., 
that it might be considered merely a variety, were it not for the 
very much thicker and more scabrous seta and the capsule, when 
old, pendulous. 
H. AcuTUM,sp. nov. Monoicum, caule procumbente vage subpinnato, 
foliis patentibus compressis ovato-lanceolatis sensim a basi ad apicem 
acutum angustatis siccitate longitudinaliter plicatis, nervo paulo ultra 
medium evanido, marginibus superne remote serrulatis, cellulis basi 
brevibus oblongis inde ad apicem elongatis angustis, pericheetialibus 
e basi erecta ovali brevi nervata subulatis angustis subintegerrimis 
recurvis, theca in pedunculo elongato ovali inclinata inzequali, operculo 
conico brevi subulirostrato, peristomio normali. 
Hab. Pack River, British Columbia, Lyall. Sent also from Boston by 
Green. 
In size and general appearance very closely resembling some of 
the less robust states of H.salebrosum, but differing from this and 
nearly all the allied species in the form of its leaves gradually 
narrowed from just above the base to the apex and not acumi- 
nate, and in the operculum. In the compressed foliage and 
spreading habit not very dissimilar to some states of H. riparium, 
Dill. 
H. ASPERRIMUM, sp. nov.  Dioicum, caule procumbente ramis laxe 
subpinnatim ramosis, folis ovatis sensim acuminatis striatis, nervo 
ultra medium evanido dorso denticulato, marginibus serrulatis basi 
anguste decurrentibus, cellulis ad angulos paucis brevioribus, superi- 
oribus elongatis angustissimis, perichetialibus e basi ovata subulato- 
attenuatis recurvis breviter nervatis, theca in pedunculo elongato 
asperrimo inclinata ovali, operculo conico acuminato, peristomio nor- 
mali. 
Hab. British Columbia, Lyall and Douglas. 
A little more slender than the usual forms of H. rutabulum, Dill., 
and with leaves gradually narrowed to the apex, not contracted at 
the top of the ovate portion of the leaf, thence acuminate, the 
margins more strongly serrulate, and the nerve distinctly dentieu- 
late towards its apex. 
