48 
JOURNAL OF THE GEOLOGICAL SOCIETY OF DUBLIN. 
Lismore, in Tyrone, is half a mile S.W. of Clogher. All the strata 
here are fossiliferous, up to the sandstone which lies south of 
Clogher. 
Lisnapaste is in Donegal, five miles south of the town of Donegal, 
and one mile and a half S.E. of the village of Laghy. About 
three furlongs south of the village of Ballinakillew is a little 
bridge, and the bed of the stream that flows through it is on 
black shale, which affords fossils of great variety, and of great 
beauty. A few chains south of this bridge, on the road-side, is 
an excavation made for repairing the roads, and the shale or 
slate here yields millions of fossils; this shale is calcareous, 
lying over the Old Red Sandstone, and at the base of the lime¬ 
stone. 
Little Island is in Cork, four miles east of the city. The lime¬ 
stone here is light gray, and very pure, and contains abundance 
of fossils, of those usual in the lower limestone in other parts of 
Ireland, with this difference—that they are in general distorted, 
as are all the fossils in the limestone of this county, and also in 
the county of Waterford, and part of Kerry. If a line be drawn 
upon the map of Ireland, from Waterford to Kanturk, and pro¬ 
duced from Kanturk to Killarney, all the fossils south of this 
line are distorted, both in the slates at the base of the limestone 
and in the limestone itself. This circumstance is likely to have 
some connexion with the violent convolutions and steep dip of 
the strata apparent in this part of the country, while it is quite 
otherwise in the midland counties, where the strata lie level, or 
nearly so. South of this line also, the soft black strata, which 
in the northern counties are shale, here deserve the name of 
slate, from superior hardness and distinct cleavage; even the 
massive limestone has strong cleavage lines. 
Magheranore, in Sligo, is two miles east of the small town of To- 
bercorry. The limestone here has fossils, especially Lithoden- 
drons, and other corals, 
Magherenny, in Tyrone, is one mile S.E. of Drumquin. The 
limestone here is impure and siliceous, and belongs to the lower 
portions of the formation; it contains some fossils. Bellerophon 
cornuarietis is found hern. 
Malahide is in the county of Dublin, nine miles N.E. of the city. 
The rock here is calcareous slate, of which the limestone and 
shales are well exposed on the sea-shore, and yield a great vari- 
