216 E. WETHEEED ON THE 10 WEE CAEBONTFEROTTS 



Millstone Grit, together with the upper portion of the Carboniferous 

 Limestone, occupy the horizon of the Yoredale rocks of the North of 

 England. This matter I shall treat of in a future paper. 



In conclusion, I desire to return my thanks to Mr. "W. C. Lucy, 

 F.G.S., for his kindness in drawing my attention to the rocks 

 referred to in this paper, and for his assistance in working them 

 out. Mr. Lucy is not, however, in any way committed to the 

 views which I have expressed. I also tender my thanks to Mr. F. 

 D. Longe, F.G.S., for the ready way in which he placed his specimens 

 from the Clifton Polyzoa-bed (Stoddart) at my disposal. 



The whole of the strata mentioned are shown in the following 

 section : — 



No. 3. — Vertical Section of the Carboniferous Strata in the Forest 



of Dean. 



Approximate 

 thickness. 

 Description. ft. Characteristic Fossils. 



Coal-measures (do not come in at 3243 Plant-remains. 



Dry brook). 

 Millstone Grit, made up of well- 370 None yet found. 



rounded grains of quartz. 

 Lower Millstone Grit, flagstones 100 Casts of Mollusca, plant-remains. 



and sandstones. 

 Upper Limestone. 116 Corals &c. 



Carboniferous Limestone ; hasma- 360 Producti, Spirtfercs, &c. 



tite in upper portion. 



Lower Limestone Shales 130 Encrinites, Bhynchonetta pleuro- 



don, Athyris Royssii, Polyzoa, 

 Annelid-jaws. 

 Many-coloured sandstones and cal- 247 No fossils identified. 



careous shales. 

 Old Ked Conglomerate. 



Discussion. 



Mr. Etheeidge differed from the author as to two points in his 

 paper. (1) He thought the term Calciferous Sandstone was inap- 

 plicable to the series described by him ; for neither lithologically 

 nor palaeontologically did they correspond with the Tuedian or 

 Cement -beds of the north. Two fossils came from the latter and 

 were always present, an Athyris and a Nautilus : these were wanting 

 in the beds described by Mr. Wethered. (2) As regards the Upper 

 Limestone Shales, there were Upper Shales in the Bristol district ; 

 but these differed palaeontologically from the Yoredale series of the 

 north, and it required better proof in order to identify them. As 

 regards the Polyzoa-bed, there was no doubt of its position ; but it 

 differed much from that described by Stoddart at Bristol. He ex- 

 plained the reason why so large an area was occupied by Millstone 

 Grit. The Yoredale beds could hardly come in there, as the lime- 

 stone was a deep-sea deposit. 



Mr. Topley said the paper showed great care and accuracy ; but 



