114 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DoC. 20, 



Pinnularia, Trigonocmya, &c. ; also Diplostylus Dawsoni* , ft. in. 

 Eurypterus, Cythere, Naiadites, and Sjnrorbis attached to 

 plants. The lower coal, called locally the " Queen's Yein," 

 has in its mineral charcoal bast cells, nniporous, rari- 

 porous, and multiporous wood- cells, scalariform vessels, 

 epidermal tissue, and vascular bundles of ferns, also stipes 

 of ferns and bark of Sigillaria. The mineral charcoal occurs 

 principally in a thick layer near the bottom of the bed. Its 

 roof has trunks of LepidopMoios, Lepidodendron, and Si- 

 gillaria, fossilized by carbonate of iron. The upper part of 

 the lowest underclay is dark and carbonaceous, with Stig- 

 marian rootlets. 



XXII. 



(Glrey sandstones, grey and chocolate shales with 

 ironstone nodules ; three underclays and erect 

 Calamites and Sigillaria in three beds) 110 



XXI. 



fGrey shale and ironstone nodtJes. 

 Coal andi coaly shale 1 foot 3 inches 1 3 

 Argillaceous underclay, Stigmaria. 



The roof contains erect Sigillarice, Stigmaria, Calamites, 

 and Cordaites. The coaly shale has fern-stipes and Cor- 

 daites. The coal itself is coarse and shaly, and has a layer 

 of mineral charcoal containing bast and epidermal tissue. 

 There are also in the coal remains of Calamites and Cor- 

 daites, and fragments, possibly, of insects. 



(Grrey and reddish shales with nodules of clay-iron- 

 stone, and grey and reddish sandstone. One un- 

 derclay supporting a coaly film, and erect trees at 



two levels) 28 6 



/'Chocolate shale. 



, I Coal and coaly shale 2 inches. 



Coal-group 10. , . ■{ Coaly shale 6 inches. - 



1 Coal 4 inches 1 



(^Argillo-arenaceous underclay, Stigmaria. 



The upper coal contains flattened Sigillarice and Stig- 

 maria. The lower bed is hard and unequal, with curved 

 laminae and obscure traces of petioles of ferns. The mineral 

 charcoal has bast and scalariform tissues. 



(Eed and grey shales and grey sandstones. Erect Ca- 



lamitesva. oneheA. Four underclays) 78 6 



XIX. 



f Chocolate shale. 



Coal-group 11... -^ Coa^ and coaly shale 8 inches 8 



I Argillaceous underclay, Stigmaria. 



The roof has Cordaites, Calamites, and rootlets. The coal 

 contains much mineral charcoal with the structure of dense 

 * Salter, Quart. Journ, Geol. Soc. vol. xix. p. 77. 



