38 
JOURNAL OF THE GEOLOGICAL SOCIETY OF DUBLIN. 
Cullion, in Londonderry, is two and a half miles S.E. of Drapers- 
town, and five miles S.W. of Maghera. In a deep ravine on the 
N.E. brow of Slievegallion mountain, the lower calcareous black 
shale contains a great profusion of beautiful fossils, among others 
Spirifer pinguis is very abundant. 
Cultra, in Down, is on the south shore of Belfast Lough, five miles 
N.E. from Belfast, and one mile N.E. from Holy wood. The rock 
here is much broken up by whin dykes. It lies on graywacke 
slate unconformably. One of those dykes forms the foundation 
of the little pier at this place, and to the west of this, the black 
shaly strata are well exposed at low water. About forty yards 
out from high water-mark, in some of the beds, the scales of 
fishes (Holoptychius PortloGkii) are found very fine; and imme¬ 
diately adjoining the pier in the fine black shale are millions of 
CythersB, of several kinds. Similar fish scales and Cytherae are 
found in the black shale band which runs across the valley of 
the Moyola near Maghera; and at the Bannagh river, near Kesh, 
in Fermanagh. From having fish remains of similar species 
found here as at Moyheeland, and the rock there having been 
supposed to be a band of black shale in the Old Red Sandstone, 
this was put in the same rock, it being impossible to fix its place 
here by visible superposition. It is very doubtful that it belongs 
to the Old Red. The rocks on the shore are much broken up 
with whin dykes, and between every two of them a rock of dif¬ 
ferent aspect is brought to the surface. There are red sandstone, 
red shale, red thin-bedded limestone, yellow magnesian lime¬ 
stone, and black and gray shale, all in the space of about half a 
mile, between high and low water mark. Those rocks in York¬ 
shire and Durham would be recognised as being in the vicinity 
of the upper part of the Coal formation, and of them, this bit of 
shore is very probably the equivalent. This would make this 
black shale belong to the coal strata, and the fish remains here, 
at Moyheeland, and the River Banagh, near Kesh, would be all 
common to that series; indeed, beside the fish remains, those 
black shales and accompanying rocks in the three places just 
mentioned are identical in lithological character. 
Curkeen, in Dublin, is seven miles north of Malahide, and two miles 
south of Skerries. The quarries here, in light gray pure lime¬ 
stone, contain a variety of beautiful fossils. 
Curragh, in Waterford, is one mile north of the village of Ardmore. 
