26 MR. W. MITTEN—BRYOLOGIA OF THE SURVEY 
O: canum. Humile, foliis patentibus elliptico-lanceolatis nervo carinatis, 
- marginibus recurvis reflexisve, apicem versus plus minus erosulis 
apice diaphanis, superioribus pilo brevi hyalino fragili terminatis, cel- 
lulis basi paucis oblongis quadratisque, inde ad apicem rotundatis 
granulosis grossiusculis, perichzetialibus ovatis subaeutis, theca emer- 
gente ovali-cylindracea plicata, operculo breviter acuminato, peristomio 
dentibus bigeminatis ciliis subulatis basi e serie duplici cellularum 
compositis interpositis, calyptra totam fere thecæ obtegente breviter 
ramentosa. 
Hab. British N. America, Drummond. 
Different from O. diaphanum, Schrad., in the form of its leaves, 
and in appearance more nearly like O. pumilum, Schw., which has 
differently shaped r leave ` s, also tipped with a minute hyaline 
fragile mucro. 
Unora, Brid. 
U. PHYLLANTHA, Brid. 
Hab. Vancouver Island, Wood. 
U. AMERICANA. Monoica, foliis siccitate tortis appressis e basi sub- 
ovali longe lanceolatis sensim acutis nervo carinatis, marginibus re- 
„curvis, siepe suberosis, cellulis basi ad margines seriebus circiter tribus 
hyalinis oblongis, in medio angustis luteis, superioribus rotundatis 
diametro circiter ;,;5 uncie metientibus, perichztialibus apice latio- 
ribus obtusiusculis, theca elliptica plicata, opercuio conico acuminato, . 
peristomio dentibus bigeminatis 8, ciliis zequilongis angustis 8, ca- 
lyptra breviter appresse ramentosa. 
Hab. Lake Huron, Todd; British N. America, Drummond, no.153, with 
U. Bruchii as U. crispa. 
Differs from U. eurvifolia, Wahlenb., in the areolation of the 
base of the leaf, and from U. crispa, Hedw., and U. erispula, Dech, 
in the same particular, as well as in the form of the base of the 
leaves. The space of a thousandth part of an inch in the middle 
of the lanceolate part of the leaves contains in U. crispa two cells, 
in U. erispulum two and a half, in U. Americana three cells. 
U. BaAncLAvr. Monoica, cxspitosa, humilis, foliis patentibus siccitate 
appressis e basi excavata subrotundata late lanceolatis acutis, supe- 
rioribus acutatis, nervo carinatis, marginibus convexis integerrimis, 
cellulis basi ad lateras oblongis in seriebus pluribus hyalinis, inte- 
rioribus pens elongatis luteis, superioribus rotundatis diametro 
circiter ;;';; unciz metientibus, perichztialibus ovato-lanceolatis con- 
volütis erectis, theca ovali et collo crasso siccitate plicata, peristomio 
dentibus bigeminatis 8, ciliis 8 Mondo interpositis, calyptra bre- 
viuscula breviter ramentosa. 
Hab. Sitka, Barclay. 
LJ 
