594 Scientific Proceedings, Royal Dublin Society. 
4. Ido not recollect to have seen any consideration of the 
point, whether the apparent anomalies between the Dingle and 
Iveragh sections could not be accounted for by a limit of deposi- 
tion or lateral interruption to the extension of the Old Red 
(Carboniferous) type ot deposits. That remarkable feature, the 
Dingle Bay and Killarney Railway fault, for some part, at least, 
appears to intervene between the apparently successional and 
discordant series. 
Having regard to this whole south-western area, continuous se- 
quence would appear to be the rule, the discordant deposits the ex- 
ception. If the northern part of Iveragh and the country eastward 
had been so gently raised as to maintain the general horizontality of 
its beds, along an east and westerly line of weakness, an unusually 
straight shore line might have been produced, against which 
to the north the whole Carboniferous series of the country might 
have been accumulating, while representative deposits south wards 
were being formed in direct succession to the Glengariff beds, or 
with slight unconformity, or none distinguishable by difference of 
inclination. Mr. Medlicott has shown with regard to a part of 
the Himalayas, that such a limit of deposition, when the rocks 
on both sides have suffered compression and disturbance, closely 
simulates a line of fault, and indeed passes along its extension 
into a genuine line of dislocation, the position being, perhaps, 
specially favourable to the occurrence of fracture. 
Subsequent depression, elevation, and denudation might have 
left the present state of things in Kerry as their result. 
The consideration of this point is only suggested as one among 
others which may be worth investigating, in studying the pecu- 
liar features of the country. It is, perhaps, as likely to account 
for these as perfectly parallel, though total, discordance in Iveragh, 
in favour of which, however, there still remains the ample evidence 
(eliminating of course all possibility of transition), collected by 
Mr. M‘Henry, and asked for by Mr. Jukes-Browne. This when 
forthcoming will no doubt have an important bearing on the 
question, and will be looked for with interest. 
5. With regard to the fossiliferous Silurian pebbles in the 
Parkmore conglomerate, 1 remember how Du Noyer on finding 
them contended that the conglomerate must be newer than the 
