414 WENL0CK SHALES OE THE WELSH BORDERLAND. [May I9OO, 



subject to common ' fashions ' at similar geological time-periods, and 

 these fashions are of great value as chronological indices. But the 

 subject is one upon which our knowledge is as yet insufficient 

 to enable us to dogmatize, and the present paper supplies us with 

 several new facts and ideas, which will all be of value in guiding 

 us on the road to correct conclusions. 



Prof. Watts referred to the fact that several years ago he had 

 succeeded in demonstrating that the Lower Wenlock Beds were 

 absent from the Long Mountain district. He was unfortunately 

 unable to continue his work in the district, but he congratulated 

 the Authoress on the marked success which had attended her detailed 

 work in the Silurian strata of the Welsh Border. 



