Vice-President’s Address. 209 
These are separated from the lower division by the 
Pennant Rock, under which come the 
(c) New Rock Series. 
(d) Vobster Series. 
These two series, as will presently be shown, form a 
Transition Series between the Upper and Middle Coal- 
Measures. 
I have seen so very few plants from the Pennant Rock of 
Somerset, that I am uncertain as to its relation with the two 
series between which it lies. 
Radstock Serves. 
The Radstock Series consists of grey shales, sandstone, and 
coal. It contains eight seams, six of which are generally 
workable.! 
The Radstock Series is separated from the Farrington 
Series by from 86 to 127 fathoms of unproductive strata, 
near the middle of which are certain very distinctive beds of 
red shale about 160 feet in thickness. Mr M‘Murtrie states 
in regard to these red shales: “It has been suggested that 
these red shales may probably be found to have a much 
wider range than is generally supposed, as similar beds are 
found in some parts of the Midland Coal Field.”” I have 
no doubt as to the correctness of the view here expressed, 
viz., that the red shales occurring in the coal fields of the | 
midland counties are of the same age as the red shales 
occurring in the Upper Coal-Measures of the Somerset Coal 
Field. The proof of this will be seen in the list of the fossil 
plants which these red shales contain. 
These red shales are well developed round the west, south, 
and east margins of the South Staffordshire Coal Field. 
They are described as Permian by the Geological Survey of 
England,? but I think it has been clearly shown—from the 
1 M‘Murtrie, Proc. 8. Wales Institute of Engineers, vol. xii., No. 5, p. 429 
et seq., 1881. ‘ 
2 Loc. cit., p. 430, 
3 Mem. Geol. Survey of Great Britain and of the Museum of Practical 
Geology — The South Staffordshire Coal Field, J. Beete Jukes, 2nd ed., 
p. 8. London, 1859. 
