‘on 
CO 
Geological Society. 
er cent. per cent. 
No. 2) .; Soluble in acid .. 4433 63723; carbonate of lime. 
veage 
8 
10) < Insoluble in acid 5523 63143 silica. 
From the 
eravel 
beds 
It only remains for me to express my hope of being able, ona 
future occasion, to enter more fully into the various remarkable 
changes which are observable in the materials enclosed within 
both the perfectly and the only partially closed nodular cham- 
bers. I also hope to be able to furnish a series of perfected 
analyses of the solid materials, and of that most interesting 
portion of the sealed-up nodular contents—namely, the water 
handed down to us from that grand old ocean,—all these 
details being inseparably connected with the flint-question asa 
whole. 
June 16, 1881. 
PROCEEDINGS OF LEARNED SOCIETIES. 
GEOLOGICAL SOCIETY. 
May 11, 1881.—Robert Etheridge, Hsq., F.R.S., 
President, in the Chair. 
The following communications were read :— 
1. “ Notes on the Fish-remains of the Bone-bed at Aust, near 
Bristol, with the Description of some new Genera and Species.” By 
James W. Davis, Esq., F.S.A., F.G.S. 
The fossil fishes described in this paper are from the Rheetic bed 
at Aust Passage. The stratum containing the fish-remains is rarely 
more than 9 inches thick, often considerably less, and is composed 
of rounded masses of hardened clay or marl, which, at the time of 
their deposition, were soft enough to receive the impressions of the 
coprolites and fish-remains. ‘There are large numbers of coprolites 
and bones of fishes, as well as some remains of Saurians, mingled 
with each other indiscriminately. The fishes belong to the orders 
Plagiostomi and Ganoidei, some of the former being of considerable ~ 
size. It is inferred, from the intermixture of Saurians and fishes, 
that the deposit is the result of shallow water existing near land, 
in which the fishes lived and the Saurians occasionally disported 
themselves. 
Besides the fossil remains of the animals which lived during the 
deposition of the Aust beds, there are also others which appear to 
have been derived from the Mountain Limestone and the Coal- 
measures, representing such generaas Psammodus, Psephodus, Helodus, 
and Otenoptychius. Fossil teeth of these genera occur scattered rather 
sparingly through the mass; they are very perfectly preserved, and 
