152 REPORTS ON THE STATE OF SCIENCE.—1913. 
in the detailed mapping of the island, and a great number of fossils and 
rocks has been collected. 
The southern half of the island, excluding the high ground of Carn 
Llundain, has been found to consist of Didymograptus bifidus shales, 
which have been invaded by a large mass of quartz-porphyry. At Foel 
Fawr these shales, with thick beds of tuff, are conformably overlain by 
dark grey rhyolites. Carn Llundain itself is built up of a series of 
rhyolites, brecciated and banded tuffs, and thin beds of highly altered 
sediments. A quartz-porphyry also occurs as an intrusive rock and is 
indistinguishable from the large mass mentioned above. At Ogof 
Colomenod there is a remarkable conglomerate. The lavas have proved 
to belong to a volcanic outburst which took place in Lower Llanvirn 
time. 
In the northern half of the island a portion of the ground occupied 
by Lingula Flags and Didymograptus extensus beds has been mapped 
out, and a large collection of fossils has been made from the so-called 
Tremadoc deposits, the D. extensus beds, and the Lower Llanvirn. 
Many of the rock specimens have been sliced, and together with the 
collection of fossils are undergoing investigation. 
Neither the field-work nor laboratory examinations are yet complete, 
and the Committee ask that they may be reappointed with a grant 
of 101. 
The Old Red Sandstone Rocks of Kiltorcan, Ireland.—Report 
of the Committee, consisting of Professor GRENVILLE COLE 
(Chairman), Professor T. JoHNSON (Secretary), Dr. J. W. 
Evans, Dr. R. Kipston, and Dr. A. SmiItH Woopwarp, 
appointed for the Exploration thereof. 
Durine the year further exploration of the Upper Devonian deposits 
at Kiltorcan, co. Kilkenny, has brought to light more material of the 
sterh of Archeopteris hibernica and of, apparently, the stem of 
Sphenopteris Hookeri, of which up to the present scraps of foliage 
only had been found. Kiltorcan is particularly rich in remains of 
A. hibernica and of Bothrodendron kiltorkense. A few fish scales 
were also found. 
The Committee thought it desirable to examine other possible 
sources of Devonian fossils. Accordingly Tallow Bridge (co. Water- 
ford) was visited. The ‘linear’ plant recorded from the Old Red 
Sandstone there proved to be a Bothrodendron. It is very abundant 
at the particular exposure sketched by J. B. Jukes in 1855. A little 
material of (apparently) Arch@onteris hibernica was found. 
This locality would repay thorough exploration. Your Committee 
recommends its reappointment and a total grant for 1913-14 of 201., 
inclusive of the balance of 91. odd. 
