1859.] DAWSON FOSSILS IN COAL. 269 



containing the remains of Dendrerpeton Acadianum and other ter- 

 restrial animals*. I at once proceeded to the place, and found, still 

 in situ in the ledge at the hase of the cliff, the lower part of an erect 

 trunk, about fifteen inches in diameter, and much more richly stored 

 with animal remains than that previously found. It was carefully 

 removed from the rock, and all the fragments containing fossils car- 

 ried off for examination. They contain numerous specimens of the 

 land-shell found in the tree previously discovered in this bed ; 

 several individuals of an articulated animal, which I believe to be 

 a Myriapod ; portions of two skeletons of Dendrerpeton, and of seven 

 small skeletons belonging to another Reptilian genus, and probably 

 to three species. I propose in the present paper to notice the mode 

 of occurrence of the remains in this curious repository, to describe 

 the invertebrate animals contained in it, and to state shortly the 

 characters of the new Reptilian species. 



§ 1. Mode of occurrence of the Fossils. — The reptiliferous tree of 

 1851 had fallen from the cliff before it was examined ; and though, 

 by putting together the fragments, it was possible to form a pretty 

 correct idea of their original arrangement, this could not be ascer- 

 tained with positive certainty. In the present specimen, the arrange- 

 ment of the materials filling the cavity of the stump could be distinctly 

 observed, and corresponded perfectly with that inferred in 1851. 

 The trunk was enclosed, as usual, in a cylinder of carbonized bark, 

 and was indistinctly ribbed in the manner of SigiUa/ria. It was 

 rooted in arenaceous shale or fine argillaceous sandstone, immediately 

 over the six-inch coal in group No. XV. of my section of the South 

 Joggins coal-measures t; and had extended upward into the overlying 

 sandstone, but the upper part had been removed by the sea. The 

 bottom of the trunk was floored with a thin layer of carbonized bark. 

 On this rested a bed of fragments of mineral charcoal, about an inch 

 in thickness, being probably the fallen remains of the woody axis of 

 the tiimk. On microscopic examination, this mineral charcoal dis- 

 plays elongated wood-cells, some of them with the pores or discs in 

 several rows, as in many Sigillaroid trees. Imbedded in the upper 

 part of the layer of charcoal were a few reptilian bones ; and among 

 the eliareoal was coiled up a Sterribergia-cast, perhaps of the pith of 

 the tree. Above the charcoal, the trunk w as occupied, to a height of 

 about six inches, with a hard, black, laminated material, consisting of 

 fine sand and carbonized vegetable matter eemented by carbonate of 

 lime. In this occurred the greater part of the animal remains, along 

 with many fragments of plants, principally Leaves <>f Naggerathia 

 {PoadteB), Carpolites, and Catamites, also many small pieces of mine- 

 ral eliareoal. showing the structures of Lepidodendron, Stigmaria, 

 and the Leaf-stalks of ferns. The upper part <>f this carbonaceous 

 mass alternated with fine grey sandstone, which filled the remainder 



i)f the trunk as Car as seen. 



The animal remains must have been introduced at intervals, in the 



i-;irlier pari of the filling of the hollow stump, and the scattered 

 * Proc. Gcol. Sor. 1852, Quart Journ. Qeol. Boa vci. ix. p 58 



f Qnnrt. .foiirn (ii-ul. Sue. vol v )> I'd. 



