138 Scientific Proceedings, Royul Dublin Society. 
and myself were convinced must be of about the same age as the 
Toormakeady conglomerates, although it was marked in Griffith’s 
map as Old Red Sandstone. This led me to seek for an expla- 
nation; and when my maps and sections were so far complete as 
to be intelligible they were carefully examined and considered 
by Griffith. Subsequently I waited on him by appointment, and 
in our conversation | learned that the marking of that district, as 
also of others on his map, as Old Red Sandstone, was done in com- 
pliance rather with received opinion than with his own convic- 
tion. That in the so-called “ Old Red Sandstone” formation in 
Treland there is amarked unconformability, while part of it ex- 
tends downwards conformably into the Silurians, and part of it 
upwards similarly into the overlying Carboniferous rocks, That 
the rocks of West Cork and adjoining portion of Kerry, of Dingle, 
of Toormakeady, of Mweelrea, of Louisburgh, of Croaghmoyle, of 
the Curlew and Fintona Mountains were as he believed of nearly 
similar Silurian age. That those in West Cork and South Kerry, 
Dingle, Toormakeady, Mweelrea and Louisburgh he had had time 
to examine properly and had mapped them as Silurians; that 
the rest had not been so carefully examined by him, but that in 
deference to Portlock’s authority and also because they were 
lithologically more or less similar to the Old Red Sandstone [Car- 
boniferous] of the Knockmealdowns, the Galtees, and the Comme- 
ragh Mountains, he had left them as Old Red Sandstone. But 
at the same time he pointed out “ the Toormakeady conglomerates 
are also similar, yet I found Silurian fossils in them.”* 
In this conversation he also stated “None of my work is guess- 
work ; all my conclusions are from personal examination. I can- 
not now work these rocks out, and my map must remain as it is ; 
the Geological Survey must finish the examination,” or words to 
that effect. 
After this interview I paid more special attention to this sub- 
ject,f and an epitome of the results of my researches (except in 
respect to the equivalents of the Dingle Beds) appears in the 
recently published “ Manual of the Geology of Ireland.” In that 
* Strictly these fossils are not in the conglomerates, but in the beds below them. As 
yet, in no place above the Toormakeady conglomerate, have fossils been found; except, 
perhaps, in the Greentuff at Mount Party—its position however is uncertain. 
+ Previously Foot and myself, in about 1864, had written a paper to show that the 
Munster Old Red Sandstone was in part Silurian, andin part Carboniferous. This paper, 
however, was not published as Jukes considered it premature. 
