DESCRIPTIVE REMARKS. lxxv 
Pictou Coal, Nova Scotia; Brachiops, and Anthracosaurus from La- 
narkshire Coal field; Loxomma and Pholidogaster from the Edin- 
burghshire Coal field. 
The largest assemblage of these remarkable Reptilia have been 
found at one colliery in the county of Kilkenny, that of Jarrow, in the 
Castlecomer district, from which place eight genera of Labyrinthodont 
Amphibia have been described by Professor Huxley. Three of these 
Keraterpeton Galvani, Pl. 41, fig. 16, Urocordylus and Lepterpeton, 
are stated to be Salamandroid animals, having long tails and well de- 
veloped fore and hind limbs ; whilst in two other genera, Ophiderpeton 
and Dolichosoma, the greatly elongated and eel-like body appears to 
have been devoid of limbs.* 
The largest fossil of this class, which must have been five or six 
feet in length, has since been obtained from the same colliery, and is 
now in the collection of the Geological Survey of Ireland, through 
the liberality of the proprietor, Samuel Bradley, Esq. ‘The author 
having compared it with a group of ribs and vertebrx, in the former 
series of fossils from Jarrow, now in the British Museum, referred by 
Professor Huxley to Anthracosaurus, but not specifically named, felt 
convinced they belonged to the same species, and with the additional 
material at his disposal, believing it to be distinct from <A. Russedli 
(Huxley), of the Scotch Coal field, named it Anthracosaurus Edget, in 
honour of Benjamin B. Edge, Esq., J. P., to whom the Geological 
Survey is indebted for much information and many specimens from the 
district. 
Fossits oF THE Prruran Rocks. 
This term was proposed by Sir R. Murchison, to include strata, 
next in the order of superposition above the Coal Measures, and called 
in England Lower New Red Sandstone, Marlstone, Magnesian Lime- 
stone, &c. The name being derived from the ancient kingdom of 
Perm, in Russia, where similar rocks occur, but which are much more 
largely developed. 
The Permian rocks in Britain consist at its base of Lower red and 
yellow Sandstones, and Conglomerates equivalents of the Roth liegende 
of Germany ; Marl Slate and Magnesian Limestone, equivalents of the 
Kupfer Schiefer and Zechstein; and Red Sandstone and Marl at its up- 
per part. 
The best examples of the series, especially of its calcareous or 
central portion are visible in the counties of Durham, York, and Not- 
tingham. 
At Manchester Red Marls and Shale occupy the position of the 
Magnesian Limestone ; these strata include some thin beds of Lime- 
stone, containing a characteristic assemblage of Permian fossils ; 
* Siluria (4th edition), p. 303. 
