PLATE 12. 



Illtjstratiye of Mr. KiifAHAN's Paper '' On Granitic and other 

 Ingenite Eocks." 



Vide Proceedings R. I. Acad., Yol. 2, Ser. 2, p. 102. 



Pig. R. Vertical section across the summit of Cashel Hill. 



Pig. S. Section across Knocksufin, showing the graduation of the oli- 

 goclasic granite through gneiss into schists, and their rela- 

 tions to some of the exotic rocks. 



