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XI. — On the Lower Palaeozoic Rocks of the Soutk-East of Ireland, and their 

 Associated Igneous Rocks. By J. Beete Jukes, M A.^ F. R. S., 4"C. ^r., and 

 the Rev. Professor Haughton, MA., F. T. C D., F. R. S., S,-c., ^-c. 



Read April 26, 1858. 



INTRODUCTION. 



IHE following Paper is divided into two separate portions: one, Geological; 

 and the other, Mineralogical. The first is written by Mr. Jukes, the second 

 by Mr. Haughton, both of whom visited together many of the most important 

 localities described. 



Sir Richard Griffith contributed some of the information and speci- 

 mens connected with Arklow and West Aston. The Rev. Professor Jellett 

 generously placed at Mr. Haughton's disposal the sum of twenty guineas, by 

 means of which the expenses incidental to the chemical analyses of the rocks 

 described in the second part of the Paper have been defrayed. The Council 

 of the Academy also allowed a sum of £20 for the purpose of illustrating Mr. 

 JuKEs's portion of the Paper. 



