(124 ) 
Europea as representing the type of B. Brownzz, it would 
seem that the only differences by which this is to be distin- 
guished from pendulum (B. cernuum), Plate 331, are the 
better developed cilia and the thin, not pitted leaf-cells. We 
have lately received from M. Philibert a specimen collected 
in Norway and regarded by him as true Brownit. This 
shows teeth with about 23 lamellae joined by very thin cross 
walls, the outer plates toward base 14 to 24 times wider than 
high and 2 or 3 cilia, not appendiculate and irregular, some 
of them nearly as long as the segments. Roughened spores 
up to about .030 mm. Flowers antoicous, ¢ and 9 very 
similar, but the first rather larger. The leaf-cells are thin- 
walled, the lower being longer in proportion to width (from 3 
to 6 to 1) than in pendulum, in which they are nearly square, 
often, in basal angles. The stem leaves are nearly all worn 
away and imperfect; a few, however, show points nearly as 
long as Schimper’s figure. In any case my Dawson speci- 
mens must be referred to pendulum and the others men- 
tioned above, except the one from Norway, are not Browniz, 
nor is Drummond’s no. 265, so there seems to be no known 
American specimens at present. 
Bryum pendulum (Hornsch.) Schimp. Dawson, in fine 
fruit July 30. Inflorescence, teeth, etc., as given for the pre- 
ceding Dawson specimens (582). 
Bryum Dawsonense R. S. Williams, sp. nov. 
Synoicous and autoicous. Tufts low, 1.5 cm. high, and 
dense. Stems branching. Outer perichaetial leaves ovate- 
lanceolate, upper stem leaves ovate, about 2.5 mm. long with 
costa excurrent the length of 2 or 3 short cells. Lower stem 
leaves much smaller and costa not quite percurrent. Leaves 
entire, or sometimes minutely serrulate towards apex with 
revolute margins from base to near apex or in very young 
or lower leaves margins scarcely revolute. Marginal cells 
4 down in upper leaves narrowed and much elongated in 
3 or 4 rows but only slightly changed toward apex. Inner 
perichaetial leaves small, lanceolate pointed, with percurrent 
costa. Median leaf-cells rhomboidal to hexagonal, mostly 
2 or 3 times longer than broad, about .o50 mm. long. Lower 
