174 Mr. R. Griffith on Mr. Weaver's Paper relative 



unusually compact, the sandstone passes into quartz-rock, but 

 it still exhibits the calamites. 



In many localities the carboniferous slate includes beds of 

 limestone, which, together with the slate, contains fossils simi- 

 lar to those which occur in the lower beds of the carboniferous 

 limestone. This is the case at Blackball Head*, on the 

 north-western extremity of Bantry bay; also at Brickeen island, 

 near Killarney; at Kenmaref|; at Clonea Castle on the coast 

 of the county of Waterford, south-west of Bally voil Head ; at 

 Goat island in Ardmore bay on the same coast; at Kilna- 

 mack, near Knocklofty bridge; on the south side of the valley 

 of the Suire above Clonmel, and many other localities. 



The following are a few of the fossils which occur in the beds 

 of carboniferous slate which are interstratified with the 

 limestone at the following different localities : 



* In the dark-gray clayslate of Blackball Head I found Spirifer semicir- 

 cularis, Phillips. 



t Retepora membranacea occurs in the carboniferous slate at Roughly 

 bridge above Kenmare, where it rests conformably on yellow sandstone con- 

 taining calamites. 



