Evans: HepatTicAE oF Puerto Rico 25 
On bark of trees, mixed with other hepatics; north slope of 
the Luquillo Mountains, Heller (4712 p.p., 4737 p.p.); El Yunque, 
Evans (53 p.p.). First collected by Schwanecke. 
Drepanoleyeunea subulata is closely allied to D. tenuis and also 
to Lejeunea (Drepano-Lej.) anoplantha Spruce, a species first col- 
lected by its author in South America but afterwards found by 
Elliott on Dominica and by Britton and Cowell on St. Kitts. 
These three species agree in their general appearance and in the 
possession of a perianth without horns, a most unusual character 
for the genus. JL. anoplantha resembles D. subu/ata further in the 
shape of its underleaves and in the presence of four elongated cells 
at the base of its leaf-lobes. It differs from the Puerto Rico 
species in its broader lobes, measuring nine to twelve cells across 
instead of seven to nine cells, in its smaller leaf-cells, averaging 
17 in the middle of the lobe, in the more obscure thickenings 
of their walls, and in its blunter leaf-apices, each tipped usually 
with a single cell. 
Through the kindness of Dr. G. Lindau, of Berlin, the writer 
has had the privilege of examining specimens of D. senuis col- 
lected by Teysmann in Java and determined by Gottsche. In 
these specimens the leaves are abruptly dilated above the base and 
then gradually narrowed to the apex, which commonly ends in a 
single row of three or four cells. This brings the broadest part 
of the lobe above the middle rather than at the middle as in D. 
subulata. Inthe Javan species also the apex of the lobe frequently 
points outward although this condition is not unknown in D. sudu- 
fata. Perhaps the most striking difference between the two species 
is found in the distinct teeth on the antical margin of the lobe in 
D. tenuis. These teeth are commonly three to five in number, 
each consisting of a single cell or of two or three superimposed 
cells. On slender branches the teeth are sometimes poorly de- 
veloped and sometimes more strongly developed than on robust 
axes. The perichaetial bracts and bracteoles of D. tenuis finally 
are strongly spinose-dentate. 
Drepanolejeunea crassiretis sp. nov. 
Yellowish-green, varying to brownish, growing in thin patches: 
stems 0.05 mm. in diameter, prostrate, irregularly pinnate, the 
