LOCALITIES OF IRISH CARBONIFEROUS FOSSILS. 
55 
lahide road. A large limestone quarry is opened here. Over it 
is seen the base of the black flags and shales dipping southwards 
10° to 20°. Under the limestone, in the centre of the quarry, 
an extremely fine-grained black shale or slate is found, which 
contains Products, Pectens, and other fossils, on which are seen 
the most beautiful and delicate markings under the magnifier. 
This must be the calcareous slate. The usual fossils occur in 
the limestone. Encrinite stems are most abundant in some of 
the upper beds. Spirifer pinguis , a fossil generally scarce, is 
abundant here. 
St. John’s Point, in Donegal, is on the north coast of Donegal Bay, 
fourteen miles N.W. of Donegal, and four miles S.W. of Dun- 
kineely. The Point here is limestone, but the peninsula inwards 
is composed of the lower rocks along the shore; on both sides of 
this peninsula the rocks are unusually well exposed, and fossils 
abundant. 
Streamhill is in Cork, three miles north of Doneraile, at the south 
base of the Galtee mountains. 
Streedagh, in Sligo, is on the coast, ten miles N.W. of the town of 
Sligo. The lowest beds of the limestone occur here, and are 
well exposed. Siphonophyllia cylindrica occurs in great abun¬ 
dance, and very large specimens. A man might walk on the bed 
of the rock, stepping from specimen to specimen of this fossil for 
several hundred yards. The fossil is above two feet long, and 
two to three inches in diameter. 
Swanlinbar, in Cavan, is ten miles S.W. of Enniskillen. This lo¬ 
cality has both calcareous slate and limestone, as also millstone 
grit. 
Swellan, in Cavan, is about a mile N.W. of the town of Cavan. 
The rock is calcareous slate, and has some fossils. They are, 
however, rather scarce. 
Swineford, in Mayo, is a small town. It is on limestone, which is 
not extensively quarried hereabouts, but contains the usual fos¬ 
sils where it is seen. 
Tankardstown, in the county of Cork, is six miles N.E. of Done¬ 
raile, and one and a half miles N.W. of Kildorrery. It is in a 
limestone locality, and very good fossils are got in it. 
Termon, in Roscommon, is half a mile west of Boyle. There is a 
geological peculiarity in this place. The calcareous shale ap- 
