112 



PEOCEEDINGS OF THE GEOIOGICAL SOCIETY. [DcC. 20, 



Coal-group 4 . . . - 



spines of fishes (Palceoniscus, &c.), with coprolitic matter, ft. in. 

 The underclay shows abundant Stigmarian rootlets. 



( Underclay and grey arenaceous shale) 6 



''Grey argillaceous shale. 



Coal 9 inches. 



Carbonaceous shale 6 inches. 



Coal 1 inch. 



Carbonaceous shale 4 inches. 



Coal 1 inch. 



Carbonaceous shale 8 inches. 



Coal 2 inches. 



Grey shale 1 foot 7 inches. 



Coals inches 4 10 



l^ Argillo-arenaceous underclay, Stigmaria. 



The roof contains obscure flattened plants. The coal is 

 hard or shaly, with vascular bundles of ferns and bast tissue. 

 The carbonaceous shales yield Cordaites horassifolia, Ale- 

 thopteris lonchitica, Catamites, SigilJaria, and Cyperites. 

 The grey shale parting has erect stumps, apparently of 

 Sigillaria, The upper shales and coals are very pyritous, 

 and decomj)ose when exposed to the weather — an indication 

 that sea-water had access to these beds while the vegetable 

 matter was still recent. 



XXVI. 



(Grey argillaceous sandstone and red and grey shale, 

 with two Stigmarian soils. Footprints, probably 

 of Bendrerjpeton, and rain-marks occur in these 

 beds ; and it was in one of them that Mr. Marsh 

 discovered the vertebrae of Eosaurus Acadianus) . 82 



XXV. 



/'Bituminous limestone 2 feet. 

 Coal ^ inch. 



Argillo-arenaceous clay, Stigmaria, 6 inches. 

 Coaly shale ^ inch. 

 Grey argillo-arenaceous shale, ironstone nodules, 



Stigmaria, 1 foot 6 inches. 

 Coaly shale 1 inch. 

 Grey shale, ironstone nodules, Stigmaria, 2 ft. 6 in. 



Coa^ 6 inches 7 2 



^^ Argillo-arenaceous underclay, Stigmaria. 



The bituminous limestone of the roof contains Naiadites 

 carbonarius andiV^. elongatus, fish-scales, and Cyprids. The 

 upper layer of coal Contains impressions of SigiUaria and 

 Lepidodendron, on some of which are shells of Spirorhis. 

 It has epidermal tissues, vascular bundles of ferns, and re- 

 ticulated vessels. The coaly shales are of the nature of 

 coarse coals, but with numerous thin layers of shaly matter. 

 The lower coal contains petioles of ferns and Oordaites matted 

 together, and numerous Cardiocarpa. The two thick clay 

 partings and the underclay are Stigmarian soils. 



XXIV. 



(Grey sandstone and chocolate and grey shales, with 



two Stigmarian soils) 147 



Coal-group 5 



