168 THE CARBONIFEROUS SYSTEM. 



On the roof of the upper coal was a fine ribbed Sigillaria with 

 Stigmarian roots. In the roof and shaly partings are Sigillaria 

 Brownii, S. Schlotheimiana, and other species, Stigmaria, Lepido- 

 dendron, Calamites, Cordaites, Sporangites glabra, Alethopteris 

 lonchitica, Sphenopteris latifolia, Pinnularia, and Cyperites ; 

 also Cythere, Naiadites, and fragments of reptilian (?) bones. 

 The coal is pyritous, and exhibits impressions of the bark of 

 Sigillaria ; it contains also bast tissue, scalariform tissue of Sigil- 

 laria and multiporous tissue of Sigillaria and Calamodendron. 



ft. in. 



(Sandstone and shale, erect Calamites and Sigillaria 

 with Stigmaria. The erect trees contain reptilian 

 remains of the genera Dendrerpeton, Hylonomus, 

 and Hylerpeton ; also Pupa vetusta, Xylobius Sig- 

 illarice, and remains of insects) . . . .10 

 ( Coaly shale. 



Coal-group 15 < Coal, 6 inches 6 



(_ Arenaceous underclay, Stigmaria. 



The erect trees above mentioned are rooted in the roof of 

 this coal. It contains Cyperites, Lepidophylla, Trigonocarpa of 

 two species, Sphenophyllum, Alethopteris lonchitica, Cordaites, 

 and Aster ophyllites. There are shells of Spirorbis on some of 

 the plants. The coal contains layers of bark of Sigillaria and 

 leaves of Cordaites, and much bast tissue, with scalariform, 

 uniporous, and reticulated tissues, probably of Sigillaria. 



(Sandstones and shales ; erect Calamites and Stig- 

 maria) . . . . . . . . 21 



{Gray shale. 

 Coal, 4 inches 4 

 Argillaceous underclay, Stigmaria. 



The roof contains Calamites, Sigillaria, Alethopteris lonchitica, 

 Pinnularia, Lepidodendron, Cyperites, Sporangites, and Spiror- 

 bis. One Sigillaria extends 30 feet without branching. The 

 roof supports an erect tree. The coal is filled with flattened 

 stems of Sigillaria lying in different directions, also flattened 

 Lepidodendra ; and in its mineral charcoal it has beautiful 

 porous and scalarifomi tissues. 



XIV. 



(Gray sandstone and gray and red shales. Many 

 prostrate trunks of Sigillaria and Lepidodendron, 

 one underclay, and erect trees at one level) . 68 



f Shale with the aspect of underclay. 

 p , . fi J Coal and coaly shale 6 inches . . . .06 



Loa -group j Argillo-arenaceous underclay, ironstone, and <5tfi</- 



[ maria. 



This bed was not well exposed, and afforded no fossils. 



