632 GEOLOGY OF THE EASTERN COMTEK OP ANGLESEY. [NOV. 1 896, 



mapping which accompanied it, were no doubt an earnest of what 

 might he expected from the Author, who would carry into his 

 labour the habits of minute and accurate observation which had 

 distinguished his field-work when he was a member of the staff of 

 the Geological Survey. 



The President said that he was pleased to find that Mr. Greenly 

 had undertaken to work out, with so much care, the geology of 

 Anglesey. There were many important points in connexion with 

 the crystalline schists and the overlying rocks which needed eluci- 

 dation ; but he was glad to find that the Author agreed with the 

 speaker and others that the crystalline schists were of pre-Cambrian 

 age and overlain unconformably by the Palaeozoic rocks. 



Prof. G. A. J. Cole congratulated the Author on picking up the 

 history of Welsh vulcanicity in Anglesey, and on the discovery of a 

 volcanic deposit on the horizon of the pisolitic ironstone, in addition 

 to the more conspicuous and better-known areas of Cader Idris and 

 Rhobell-fawr. He also compared the conglomerates containing 

 blocks of the contemporaneous Carboniferous beds with those on the 

 opposite Irish coast north of Rush, which occur along the junction 

 of the Carboniferous Limestone and the old Ordovician shore. 



The Author expressed his thanks to the Society for the manner 

 in which the paper had been received. 



