(127) 
BrRYUM VENTRICOSUM compAcTuM (B. & S.) Williams. 
(B. pseudotriquetrum compactum B. & 8.) 
Dawson, July 17, in fine fruit. A much smaller plant 
than the species, in very compact tufts. The leaf-cells and 
spores seem to be rather smaller also. The medium cells 
measure .oo8 mm. wide and .o16 to .025 mm. long, the spores 
up to .o1g4 mm. The dorsal plates of teeth are rather narrow, 
about 1 to 3 near base, lamellae 30. Cell walls of the leaves 
usually seen to be distinctly pitted under a magnification of 
300 dia. or more (583). 
Bryum submuticum Philibert, sp. nov. 
Dioicous. Male flowers bud-like with leaves ovate and 
more or less spreading but not reflexed near middle, abruptly 
much smaller on stem below. Plants growing in extensive 
mats 2 or 3 cm. thick, stems scarcely branched, felted to- 
gether with a dense mass of radicles below. Outer peri- 
chaetial leaves 24 mm. long, ovate, somewhat acutely pointed 
with costa percurrent or excurrent the length of 1 or 2 short 
cells, upper stem leaves a little shorter and costa vanishing 
just below apex, all entire or nearly so with a distinct revo- 
lute border of about 3 rows of long narrow cells near middle, 
towards apex the margins flat and cells not much elongated. 
Inner perichaetial leaves ovate-lanceolate with costa vanish- 
ing just below apex. Median leaf-cells about .035 mm. long 
and 3 as broad, lower cells short rectangular (about 1-1} or 
2). Cell walls all somewhat thickened but not pitted. Cap- 
sule with lid up to 24 mm. long, slightly narrowed under the 
mouth, the sporangium gradually narrowed to a shorter col- 
lum. Exostome pale yellow below. Plates of teeth narrow 
(about 1-3) near base, lamellae from 25-30. Basal mem- 
brane of endostome extending } up, the segments broadly 
perforated and separated by mostly 3 appendiculate cilia. 
Two or 3 rows of transversely elongated cells about mouth 
of capsule, the cells near middle broad, often scarcely elon- 
gated with somewhat sinuous walls, at base very irregular 
and sinuous walled. Oblong stomata about .035 mm. long. 
Smooth spores up to .o1g4 mm. Annulus of 4 rows of cells. 
(Plate 19.) 
This species is quite near the preceding variety but still 
smaller and more slender. The leaves are broader, shorter 
