LOCALITIES OF IRISH CARBONIFEROUS FOSSILS. 
3 
For these reasons I have thought it advisable to classify the fos¬ 
sils according to the mineral character of the beds in which they 
are found, and I have, therefore, put in the Table four small columns 
to suit the four subdivisions above-named. 
At Benburb, in the county of Armagh, in the cutting for the 
Lough Erne and Lough Neagh Canal, a section is visible in which 
sandstones, limestones, and calcareous slates, three or four bands 
of each, are interstratified with one another, in about a quarter 
of a mile of distance, all dipping westward at an angle of about 20°; 
and facts of this nature are not unusual in the north of Ireland. 
In all such cases, the fossil, found in a limestone band, I have put 
into the column for limestone; every fossil got in calcareous slate 
is marked in the slate column; and those found in sandstone are 
entered in the column for that rock, and so also with the molluscous 
fossils of the coal series. 
The millstone grit and coal-measures I have included in one 
mineral subdivision or column; because those two in Ireland are 
conformable and alike. I do not know how many feet above the 
limestone the millstone grit ends, or the coal-measures begin. There 
does not appear in this country any good reason for these distinc¬ 
tions. 
The plants of the coal-measures are not included in the Table. 
No good collection of them from Irish collieries has been described. 
Many fine specimens of undescribed plants were got at Dromagh 
colliery, near Kanturk, in the county of Cork, in 1842, but Mr. 
M‘Coy did not describe any new plants in the Synopsis. 
Opposite the name of every fossil a star is put in the column, re¬ 
presenting the mineral subdivision in w r hich it was found; where a 
fossil has been got in two or three of those subdivisions, a star is put 
in the proper column in each case, to represent it. 
Where two stars are marked in one column and one in another, 
they show that the fossil is more abundant in the division marked 
with two stars than in the other; and where three are marked in one 
column, they show that the fossil has been found in three localities 
at least, in that subdivision, and not in any other, or that the fossil 
is peculiar to that mineral subdivision. 
The names of localities in general are the townland names on 
the Ordnance maps: but in a few cases, deviations are made from 
this rule; for instance, Malahide is given as one locality, although it 
