266 FOSSILIFEROUS SILURIAN OF KERRY. [May 1902, 
Authors. He congratulated them meanwhile on having found a 
new locality for the ‘ Lambay Porphyry.’ 
Prof. Groom said that the Society would welcome the work of 
the Authors as an important addition to our knowledge of the 
Dingle promontory. A comparison with the Killary district to 
the north would probably prove interesting, particularly in respect 
to the development of igneous rocks in the Silurians. He inquired 
whether, in view of the circumstance that the ‘ Dingle Beds’ had 
been regarded by some as Silurian, the existence of an Upper 
Ludlow horizon had been definitely established in the underlying 
series. He thought that it should be clearly recognized that of the 
two series of movements, to which allusion had been made by the 
Authors, the first might have taken place after the deposition of 
the Lower Old Red Sandstone, and the second partly before the close 
of the Carboniferous Period. 
Prof. Sottas said that he had listened with pleasure to the 
Authors’ account. of what seemed to him an excellent piece of work, 
but hoped some further ight might be thrown on the apparent 
commingling of Llandovery and Wenlock fossils. Pentamerus 
oblongus, however, occurs in the Wenlock of Gotland. 
Prof. Rrynoxps stated, in reply to Prof. Watts, that some of the 
tuffs were fossiliferous, and that the Authors had no doubt at all 
about the contemporaneity of both rhyolites and tuffs. With regard 
to Prof. Watts’s suggestion that the peculiar association of Llan- 
dovery fossils with a fauna which, on the whole, was indicative of 
a higher horizon, might be due to inversion on a small scale, 
he statea that he did not think this suggestion would explain 
the state of affairs, as, although there was one great overfold 
in the district, the beds, taken as a whole, were not much dis- 
turbed and the included fossils showed little sign of distortion. 
No olivine-dolerites, or rocks the character of which at all led one 
to suppose that they were of Tertiary age, occurred in this inlier. 
In reply to Prof. Groom, he stated that the Authors had not recog- 
nized any particular horizon in the Ludlow Beds described, and that 
if was quite possible that the lower part of the Dingle Series might 
be of Upper Ludlow age. The rocks referred to in the paper as Old 
Red Sandstone were generally correlated with the Upper Old Red 
Sandstone of Britain. 
