Kinahan — On Irish Arenaceous Bocks. 525 



between them and those of Yorkshire, where Phillips' name was introduced. What 

 English geologist would attempt to divide up the Devonshire " Culm-measures" into 

 Toredale beds, Millstone Grits, and Coal-measures ? The section of the Carboniferous 

 rocks in Fermanagh and Monaghan (?) is different to any elsewhere in Ireland. Be- 

 ginning below, there is — (1) Lower Carboniferous Sandstone ; (2) Shales; (3) Dark- blue t . 

 thin-bedded Limestone, ivith Shale partings ; (4) Amorphous Limestone (Fenestella Lime- 

 stone) ; (5) Shales and Limestone; (6) Sandstone; (7) Shales ; {8) Amorphous Lime- 

 stone under cherty Limestone ; (9) Sandstones; (10) Shales; (11) Sandstones, §c. The 

 groups 9, 10, and 11 belong to the Lower Coal-measures, and 9 and 10, or Lower 

 Coal-measures, may be called the Fermanagh series, after the county in- which they are 

 best developed, and not after " Yoredale," where the rocks are different. Group 11 is 

 a portion of the Middle Coal-measures. Groups 1 to 4 are somewhat like the rocks of 

 Munster ; but groups 5 to 10 are of different characters and arrangement ] 



This tract is interesting. If we begin to the eastward, we 

 find sandstones and shales, with small coals, to the north of 

 the Tyrone Coal-field (Dungannon), where undoubtedly they 

 belong to the middle or Calp division of the Limestone. In them, 

 as pointed out by Hardman [G. S. M.), there are fossils of Coal- 

 measure types. South-west and westward of Dungannon are 

 small tracts of similar rocks ; also farther south-west — north-east, 

 south-east, and south of Aughnacloy, all of which appear on 

 the new maps as Calp sandstone ; but immediately after we cross 

 the Blackwater — that is, leave the Aughnacloy area, and go south- 

 west — the apparently similar rocks in the district of Slievebeagh 

 are mapped as Yoredale beds and Millstone Grits. Baily contends 

 that these rocks ought to be mapped as Lower Carboniferous Sand- 

 stones and Shales, as the fossils are of these types ; while Kilroe 

 states it is difficult to see any difference between the rocks of the 

 Slievebeagh district and those of the Calp (67. S. M.). In these 

 rocks of this Fermanagh series (as it will hereafter be called) and in 

 the acknowledged Calp the sandstones are very similar, the " Dun- 

 gannon stone" in the Calp and the " Lisnaskea stone" in the 

 Fermanagh series being of one class and equally in repute. In 

 the Calp sandstones north of the Tyrone Coal-field and in the Lis- 

 naskea quarries have been found similar large fossil trees, while 

 the assemblage of fossils in the Fermanagh series, according to Baily, 

 is that of the Lower Limestone Sandstone and the Calp, and 

 is not like that of the Coal-measures. But as the section in 

 South-east Fermanagh, between Lisnaskea and Slievebeagh, is 

 identical with that of the known Coal-measures in Belmore and 

 Cuilcagh (West Fermanagh), it is evident that these rocks of the 



