290 ox THE CAjyiBEIAX EOCKS IX X.W. CAEEXAEYOXSHIRE. 



from the parent rock. At Llyn Padarn the Cambrian conglomerates 

 rest on the cleaved edges of the underlying felsitic rocks, therefore 

 the latter cannot be intrusive in the Cambrian. 



Prof. Blake, in reply, said he had the advantage of having read 

 Prof. Hughes's and Dr. Hicks's papers. He showed that if Prof. 

 Hughes's view of the Twt-Hill quarry-section were correct, the 

 change would not be opposed to his (Prof. Blake's) contention. 

 Some other objections were answered in detail. 



