310 MESSRS. HANCOCK AND ATTHEY ON A 



XIV. — On a new Labyrinthodont Amphibian from the Northum- 

 berland Coal Field, and on the Occurrence in the same Locality 

 of Antliracosaurus Russelli. By Albany Hancock, F.L.S., 

 AND Thomas Atthey. 



We have recently obtained from the black shale associated with 

 the Low-Main Seam at Newsham Colliery, in the neighbourhood 

 of Newcastle-upon-Tyne, the remains of a small amphibian be- 

 longing to Professor Huxley's genus TJrocordylus.^' This is the 

 second generic form that has occu.rred to us in this locality of 

 the interesting series described by that learned paleontologist 

 from the Jarrow Colliery, in the county of Kilkenny, Ireland. 

 We propose to name this species Urocordylus reticulatus. We 

 have adopted the specific denomination reticulatus as expressive 

 of the reticulated structure of the surface of the cranial bones. 

 The specimen now before us is composed of the head and twenty- 

 three or twenty-four vertebrss in a continuous series ; the dorsal 

 aspect of the head is exposed to view, and the vertebrae lie with 

 their left sides uppermost. The entire length of the specimen 

 is 2J inches. The head, which is much crushed and injured by 

 the fracture of the bones, is of a subtriangular form, with the pos- 

 terior region truncated, and tapering in front to a short rounded 

 snout ; and there are two large curved horns projecting back- 

 wards from the occipital region, like those of Kerater]peton.\ In 

 Professor Huxley's species the horns were not observed; but 

 this is not to be wondered at, for the head was in a very bad 

 state of preservation. In our specimen, too, the bones are so 

 much broken up that it is impossible to determine their forms ; 

 the surface, however, of several of them is in excellent condi- 

 tion, and exhibits, in the most distinct manner, a coarse reti- 

 culated structure of elevated ridges or lines, which, from the 

 elongation of the meshes in some of the bones, have the appear- 

 ance of strong, raised, parallel striae. The head measures from 



* " On a Collection of Fossil Vertebrata from the Jarrow CoUiery, comity of Kilkenny, 

 Ireland," by Thomas H. Huxley and E. Perceval Wright (Trans. Royal Irish Academy 

 1867, Vol. XXIV). 



t See op. cii. 



