REMAINS IN THE COAL-EORMATION OF NOVA SCOTIA. 
643 
A specimen of the skull was also obtained showing its internal surface, and exhibit¬ 
ing clearly the sutures of the several bones. This I have submitted to Professor 
Cope, and give a diagrammatic representation of it (Plate 44, fig. 132), showing 
his interpretation of the several bones, which apparently accord in number and 
arrangement with those of Labyrinthodontia, but differ from those of the Microsauria, 
in so far as the crushed condition of these latter enable an opinion to be formed. 
Under the microscope, the bone of Dendrerpeton presents large and somewhat 
rounded or oval cells with numerous canaliculi filling the intermediate spaces. The 
teeth have the dentine folded at the base, but sometimes only on the inner side. The 
tubes of the dentine are simple and fine, in this resembling those of Baphetes and 
other Labyrinthodonts. 
The abdomen of Dendrerpeton was protected by numerous broadly sub-oval scales, 
arranged en chevron , but I have not been able to detect with certainty any thoracic 
plate, though I have one specimen which I think may be a part of such a plate. 
Other characters of this species will be found in the memoir and works above 
cited. 
10. Dendrerpeton Oweni, Dawson (Plate 44, figs. 131, 138, 139). 
[Journal of Geological Society, vol. xviii., p. 469. Air-breathers of Coal Period/ p. 32. 
‘ Acadian Geology/ p. 368.] 
This species is represented by four specimens in the new material, and these serve 
to establish its distinctness from the last mentioned, in its smaller size, its more 
delicate cranial sculpture, and its longer and more curved teeth. Its abdominal scales 
are also narrower and more pointed, approaching in this to the oat-like form of those 
of Hylerpeton. So far as known, the scaly covering of the back, of this species was 
similar to that of D. Acadianum. 
Other characters of the species will be found in the memoir and works above 
cited. 
11. Sparodus, sp. (?) (Plate 40, figs. 52 to 56). 
In the coaly matter or mineral charcoal at the base of tree No. 10, appeared a few 
fragments of an animal which may possibly belong to the above-named genus of 
Fritsch, though I am by no means certain of this identification or of the real nature 
of the animal. 
The skull is represented by a fragment of a maxillary or intermaxillary bone, with 
blunt conical teeth. It is smooth or marked merely with microscopic dots. There is 
also a fragment which may be a palatal bone studded with minute teeth. 
A few vertebras associated with the above bones are long and narrow, with large 
zygapophyses and long neural spines. Length of body about 3 millimetres. 
