"On examining the figures (208, pl. IV) it will be seen that the bones of the skull were corrugated as in the large _Dendrerpeton_, but with a smaller pattern. The forms of the jaw-bones also, and of the vertebræ, ribs, scapular bone, bones of the limbs, and bony scales, are very similar, and indicate that in general form this creature was not far removed from its larger relative. The bones of the foot especially deserve attention. This is the most perfect foot of _Dendrerpeton_ hitherto found; and I have enlarged it in the figure (208) in order more distinctly to show its parts. It presents three long toes with traces of a smaller one at each side, so that there were probably five in all. If these toes be compared with the footprints on the slab discovered by Dr. Harding, it will be seen that they very closely correspond, though the toes of the present species are much smaller. The footprints are precisely those which we may suppose an animal of the size of _Dendrerpeton acadianum_ would have made if, as the bones found render in every way probable, this larger species had a foot similar to that of _D. oweni_. I suppose, for this reason, that these footprints are really those of Dendrerpeton acadianum and that this species continued to exist from the time of the lower Coal Measures to the period when those higher beds of the series, in which its bones are found at the Joggins, were deposited. "The present species must have lived in the same places with its larger relative, but may have differed somewhat in its habits. Its longer and sharper teeth may have been better suited for devouring worms, larvæ, or soft-skinned fishes, while those of the larger _Dendrerpeton_ were better adapted to deal with the mailed ganoids of the period, or with those smaller reptiles which were more or less protected with bony or horny scales. REMAINS OF SKIN AND HORNY SCALES.