[Fuprvuary, 1882. | 
THE 
SOIENTIFIC TRANSACTIONS 
OF THE 
BOYAL DUBLIN SOCTETY. 
VOLUME IL. (SERIES IT.) 
XVIII.—-On the Laurentian Rocks of Donegal, and of other parts of Ireland. By Enwarp 
Hui, LL.D., F.R.S., &c., Director of the Geological Survey of Ireland.—Puarus 
XX. anp XXI. 
DUBLIN: 
PUBLISHED BY THE ROYAL DUBLIN SOCIETY. 
PRINTED BY ALEX. THOM & CO,, 87, 88, & 89, ABBEY-STRERT, 
THE QUEEN’S PRINTING OFFICE. 
FOR HER MAJESTY’S STATIONERY OFFICE. 
1882. 
