258 BRITISH CARBONIFEROUS BRACHIOPODA. 



Carboniferous Bed and Yellow Sandstone. Mr. Kelly has, moreover, informed me, that in 

 Ireland this red rock is not that which predominates, that it averages about one thousand 

 feet in thickness, and is not much exposed, being usually covered with Limestone, except 

 at the outcrop ; that the 2nd, or Calciferous Slate, is not considerable in thickness, 

 and that, in the best developed places (Clonea and Dungarvan), half of it is made up 

 of bands of Limestone, the other half Calcareous Slate. The fossils in both he states 

 to be inseparable, so that the Calciferous Slate and Mountain Limestone might be 

 considered as one division, but that it is, perhaps, more correct, as a lithological distinction, 

 to separate them into two. The Carboniferous, or Hibernian Limestone, is fifty feet 

 thick at Drumquin, in Tyrone, and about 1500 feet thick at Black Head, in Clare; 

 it occupies about 20,000 square miles in Ireland ; while the coal measures are 2000 

 feet or more. Such are Mr. Kelly's views relative to the subdivisions of the Carboniferous 

 system in Ireland. The great bulk of the specific forms among the Brachiopoda are 

 found in the Calciferous Slates and Mountain Limestone, but few species occurring in the 

 Red and Yellow Sandstones, or in the Coal measures. I include, also, in the Carboniferous 

 Limestone, those bands of Limestone south of the Blackwater River, such as those 

 of Cork, which have a strong cleavage (the fossils they contain being usually much 

 contorted). I do so because the fifty-eight species of Brachiopoda, discovered in them 

 by Mr. J. Wright and other geologists, are all the same as those common and charac- 

 teristic to the Carboniferous Limestone of other parts of Ireland, as well as of England, 

 Scotland, and the Continent generally, and which will be found enumerated, after careful 

 identification, in the column of the table devoted to the county of Cork. With these 

 preliminary observations I will now give the list of localities drawn up for this Monograph 

 by Mr. Kelly ; Mr. Joseph Wright having added those of Cork and from some other 

 counties with which he was acquainted. 



County of Armagh. — Annahugh (Limestone), six miles north-east of Armagh ; Armagh, 

 about the town ; Ballygasey, four miles north of Armagh ; Benburb, six miles north- 

 west of Armagh ; Calragh, five miles north-west of Armagh ; Down, a quarter of a 

 mile south-west of the town ; Drummanmore, one mile north-east of Armagh ; 

 Kilmore, six miles north-east of Armagh ; Tullyard, one mile north of Armagh. 

 (Carboniferous Limestone in all these localities.) 



Coiik. — Little Island, four miles east of Cork ; Windmill quarry is situated at the southern 

 extremity of Cork ; Midleton, thirteen miles east of Cork ; Blackrock, two miles east 

 of Cork; Carrigtwohill, eight miles east of Cork; Rafeen, five miles south-east 

 of Cork ; Mallow, on the River Blackwater ; Glounthane, four miles east of Cork ; 

 Carrigaline, six miles south-east of Cork; Bally waiter, two miles north of Castle- 

 townroehc; Castletownroche, eight miles north-eastof Mallow; Strcamhill, three miles 

 north of Doncrailej Ringaskiddy, eight miles south-east of Cork ; Fort William, one 



