380 CARBONIFEROUS LIMESTONE OF THE MENDIP AREA. [May I906. 



possible to correlate accurately these two stages, as denned in the 

 South-West of England and South Wales, with the Tournaisian and 

 Visean stages of the Belgian geologists. The Syringothyris-Zone 

 formed the uppermost part of the Clevedonian in l)r. Vaughan's 

 scheme, but the equivalent part of the Belgian sequence was included 

 in the Visean by the Belgian geologists. In answer to Sir Archibald 

 Geikie, the Author stated that the work of the Belgian geologists 

 had received full attention in Dr. A. Vaughan's paper x on the 

 Bristol area : a correlation of the Bristol sequence with the Belgian 

 sequence was contained in that paper. 



1 Quart. Journ. Geol. Soc. vol. lxi (1905) pp. 255-57. 



