444 Dawson—New Carboniferous Batrachians of Nova Scotia. 
larger size than the scales. On the whole this species was 
probably a somewhat clumsy creature, of toad-like form and 
slow gait, and with a dentary apparatus suited to pierce and 
crush crusts and shells. It is perhaps significant of its habits, 
in these respects, that the layers of this tree in which its bones 
occur are alone those in which shells of Pupa vetusta are found. 
The second species of Hylerpeton, which I may provisionally 
name Hf. longidentatus, was of somewhat smaller size, with the 
bones of the skull thinner and more slender, and the teeth very 
long and sharply pointed, with the apex finely striate but with 
no corrugation of the denti The vomer is covered with 
minute teeth, and there are long and slender canines. The best 
preserved mandible shows eighteen teeth which are strongly 
inclined backward. The scales are very narrow and there 1s a 
large thoracic plate. The general form of body may have been 
as in the last species, but the skull was probably narrower and 
the feet longer. ; 
Another species of this genus, or belonging to a genus inter- 
mediate between it and Hylonomus, is represented by a confu 
mass of bones showing long and narrow jaws, armed with short 
and blunt teeth, of which, at least thirty occur on each side of 
the lower jaws. The sculpture of the bones is as in the prevl 
ous species, but the pulp-cavities of the teeth are smaller and 
their walls stronger, and they show no sculpture on the apex; 
in which respects they resemble those of Hylonomus. The 
vertebre also are more elongated and the femur is a large bone 
indicating a powerful hind limb. The abdominal scutes are 
very long and narrow, resembling slender semi-cylindric 
a point in which this species differs from all the others found 
with it, although it resembles some of those found in Ireland 
and Ohio. This species I would name provisionally, in allusion 
to the form of its teeth, Hylerpeton curtidentatum. 
In all these species of Hylerpeton, the teeth are simple, and 
are anchylosed to the bone and placed in linear series In a 
shallow groove. 
3. Remains of Dendrerpeton. 
as to 
to the 
er species, except in the form of the teeth and scales. 
the most interesting facts presented by a cursory eX 
of the specimens relate to the skin and its appendages. 
