{MATTHEW] ON SOME NEW SPECIES OF DEVONIAN PLANTS 191 
then intervals where no scars are found; other stems show points of 
attachment for leaves at more frequent intervals, 10 to 12 mm. apart. 
The flattened stem also shows the imprint of vascular strands along the 
middle. 
The long, slender leaves of this species are found in great numbers 
on some layers, often with the scarred stolens and rootlets intermingled. 
In adjoining layers to these may be found scattered leaves and ultima:> 
branches of this species which are forked at long intervals, and which 
for width and substance cannot otherwise be distinguished from the 
leaves. Sir William figures this species in his Fossil Plants of the 
Devonian and Upper Silurian of Canada (PI. X, fig. 122). This 
figure shows a somewhat tangled assemblage of the leaves, etc., of this 
species, and the way in which they are inclined to run in one direction 
in the shale; but the leaves are narrower than in the examples from 
Gaspereau. 
I think there may be some question as to whether this is the same 
species with the plant from the Little R. group which formed the basis 
of the species P. elegans; at least we have not found it in the tufted 
form represented as the type of P. elegans. For the type of this species, 
see Quart. Jour. Geol. Soc., Vol. XVIII, Pl. XIV, figs. 29 and 30. 
Fruits of Psilophyta.—With abundant remains of the plants of this 
genus one might expect to find many sporangia; a few spore cases have 
been found, but not by any means the abundance of them that one 
might expect. They are of three different kinds; the largest of these 
is similar in form to, and nearly as large as Sir William Dawson's 
Cardiocarpon tenellum; the other two are smaller; one is oval with 
a rib along one side, the other is ovate. We have no means of telling 
to what species these sporangia belong. 
PSILOPHYTON ELLSI, n. sp. 
Root unknown. Stem about 3 mm. wide, upright, much branched, 
the branches are from 14 to 2 mm. wide, and 60 mm. or more in 
length; the ultimate branches are rigid near the base, and as preserved 
have a few irregular longitudinal ribs; but in the outer two-thirds of 
their length these branches become flattened, and flexed downward and 
are longitudinally striate; this ribbon-like portion of the branch thus 
takes on the appearance and perhaps the functions of a leaf; they are 
usually somewhat convex and sometimes show a rib or revolute edge at 
the margin. This portion of the ultimate branch is usually somewhat 
wider than the inner rounded and rigid portions. Twigs of this plant 
preserved in sandstone show a strongly ribbed surface sometimes as 
many as six ribs can be counted, but they are variable both in length 
