60 Tilli CARBONIFEROUS. 



than those, in pi'cvious finds, which I have referred to D. Oweni and 

 to Hylonomus. On some portions of it there are delicate transverse 

 lines about a quarter of an inch apart, and apparently corresponding 

 to those which on the newts and Menobranchus mark the bands of 

 subcutaneous muscles. The bony scales of the abdomen have dis- 

 appeared, except a few scattered in the matrix. But the most 

 remarkable dermal appendages are those triangular lappets or frills 

 of which I have in previous papers described detached examples, and 

 have compared them with the gular and cervical lappets and frills of 

 iguanas, geckos, and Draco ; and which also suggest analogies with 

 the processes that support the gills in perennibranchiate batrachians, 

 and with the lateral folds of the skin in ^lenopoma. These append- 

 ages are flat and of appreciable thickness, about half an inch in length, 

 and an eighth of an inch in breadth, terminating in an edge or obtuse 

 flat point, which seems to have been horny, while the appendage 

 itself must have been flexible. They are marked with small scaly 

 oval areoles or projections, placed somewhat in rows, and each with 

 a minute pimcture in its centre. The markings on both sides are 

 similar. These appendages are arranged in series along what appears 

 to be the skin of a fore leg, and also in groups apparently on the an- 

 terior part of the body, perhaps the neck or shoulder. They appear 

 to be closely connected with a series of much smaller angular points 

 which extend along the edge of the skin near the supposed leg, and 

 probably fringe the sides of the abdomen. The evidence that this 

 integument belongs to Dcndrerpeton Acadianum is derived from the 

 presence in its anterior part of skull-bones having the markings of 

 that of this species, and from the occurrence of a jaw and other bones 

 in the neighbouring matrix. The specimen to which the skin be- 

 longed may have been about a foot in length. Taking it in connec- 

 tion with what is known of the skeleton, we can reproduce the external 

 appeai-ance of the animal. It was lizard-like in form, with a some- 

 Avhat flat and broad head, and strong teeth with folded dentine. Its 

 back was covered with a shining skin filled with microscopic horny 

 scales. Its sides were marked with vertical bands separated by delicate 

 indented lines. Anteriorly it was ornamented with numerous cutane- 

 ous lappets or pendants. The sides were bordered with a row of 

 sharp horny points, and the throat, thorax, and abdomen v/ere protected 

 by bony scales and plates, the scales of the throat being narrow and 

 small, and arranged in a chevron pattern. 



Dcndrerpeton Oweni probably had the scales of the back and the 

 horny appendages larger in proportion, that is, if I have rightly 

 referred to that species some similar remains to those above men- 



