LOCALITIES OF IRISH CARBONIFEROUS FOSSILS. 
47 
out well. Where a vertical crack occurs in the rock, which has 
admitted water for years, the rock becomes partially decomposed, 
for six or twelve inches away from the opening, and this part 
also yields the fossils clean. The sound shale also contains them, 
but they cannot be got well out. There is no cleavage in the 
shale here, as at Ballinacourty, or other parts of the south of 
Ireland. The mass of the hill is composed of strata, lying nearly 
level. 
Lacken, in Roscommon, is three miles S.E. of Athleague. The 
country for many miles about this place is limestone, light gray, 
and unmixed with shale. 
Laghy, in Donegal, is a village four miles south of Donegal, on 
the Ballyshannon road. This locality is near the base of the 
limestone. 
Lane, in the county of Dublin, is on the sea-shore, two miles S.E. 
of Skerries. The limestone rock is well exposed here. An area 
of some acres of it on the surface between high and low-water 
mark is dolomite. 
Laracor is in Meath, two miles south of Trim. Light gray lime¬ 
stone occurs here, and contains a good variety of fossils. 
Laragh, in Cavan, is six miles east of Cavan, and one mile north 
of Stradone. In this place is a basin of the lower part of the 
Carboniferous rocks, comprising sandstone, shales, and limestone, 
resting on the graywacke slate of the surrounding country. 
Fossils are found here. 
Larganmore, in Mayo, is fourteen miles west of Crossmolina, and 
four miles west of Corick bridge. Immediately north of the 
Belmullet road rises a series of beds of black shale, with a few 
beds of impure blackish limestone. A great variety of the black 
shale fossils, as Modiolse, Nuculae, Cypricardise, Cytherse, &c., 
are found here. These shales are over the Old Red Sandstone. 
Leam is in Fermanagh, two miles east of the village of Tempo, and 
three miles west of Fivemiletown. The Manyburns river flows 
here through the lower shales, and affords sections which yield 
the usual fossils. Cypricardia socialis is found in great abun¬ 
dance. 
Leck is in Monaghan, two miles north of Glasslough, is on lime¬ 
stone which contains fossils. 
Lisardrea is in Roscommon, two miles S.W. of Boyle. This is a 
limestone locality, but not very fossiliferous. 
