80 
SECTION OF THE TWO-FOOT SEAM. 
LITHOLOGICAL STRATA Fossrz FLoRA 
Ulodendron 
Lindleyanum 
Fine Duns Lepidodendron 
8 feet thick Sternbergii 
Calamites 
ramosus 
Cordaites 
Shale, 8 inches thick Cordaites 
Black Dun, 6in. thick Cordaites 
Coal, 2 feet thick 
Dee a . 
Scale—} of an inch=1 foot. 
The next seam of coal which I propose to notice is the Great 
Vein. It is, as the name implies, the thickest of any, 
averaging from four feet and a half to five feet, and is 58 yards 
above the ‘“‘ Two-foot ” seam. 
The greater number of genera and species of plants found 
here are similar to those over the latter. Ulodendron Lindley- 
anum is less abundant, and the specimens are not so large. The 
fructifications of Lepidodendron Sternbergvi are in places numer- 
ous, but I have not yet found a main stem. Calamites radiatus, 
Cordaites, and Alethopteris oreopteridis occur for the first time. 
Owing to this seam of coal being thick, it is not necessary to get 
much of the overlying strata down for the construction of the 
underground roads ; therefore there are few opportunities for 
observing its Flora, because the fossils are usually found a few 
