PROCEEDINGS OF GEOLOGICAL SOCIETIES. 
137 
Dr. Buckl and from stratigraphical considerations, and the subsequent modi- 
fications and further subdivision established by recent careful comparisons 
of the fossils having been briefly noticed, the author proceeded to define 
the two portions of the Lias which were treated of in this paper. The 
Middle Lias was stated to comprise all the beds between the zone of 
Ammonites communis above, and that of A. o^avicostatus below ; and the 
Upper Lias to include the beds commencing with the zone of A. communis, 

and ending with that of ^. Jurensis ; or, all those resting on the zone of 
A. spinatus, and superposed by that of .4. Muvchisonicp, — the beds formerly 
termed ' the Sands of the Inferior Oolite ' being referred to the L^pper 
Lias. The sections exposed at Black Venn, Westhay Cliff, Golden Cap, 
and Down Cliffs were described in succession, the fossils found in each bed 
being given, as well as the vertical range of the Ammonites. 
The occurrence of a new genus of tlie Belemnitidae in the Belemnite-beds 
of the Middle Lias was noticed, and a description of its general features 
given, with a list of the associated fossils. 
Mr. Day then exhibited, in the form of a generalized section, the 
different Ammonite-zones into which the Middle and L^pper Lias of the 
Dorsetshire coast could be divided, and gave lists of the fossils peculiar to 
each. 
Geological Society. — March 4. — " On the Permian Rocks of North- 
Eastern Bohemia," By Sir Roderick I. Murchison, K.C.B., F.R.S. 
The author, accompanied by Dr. Anton Fritsch, of Prague, made a 
transverse section of the rocks exposed by railroad-cuttings between Josef- 
stadt on the S.S.E. and Semil on the N.^T.W. These rocks, simply termed 
Roth-todt-liegende by the Austrian and Saxon geologists, are however of 
very varied mineral characters and of very considerable dimensions. They 
consist, in ascending order, of, 1st, coarse conglomerate and sandstone, 
followed by thin courses of schist, with fishes (Palteonisci, etc.), and inter- 
stratified igneous rocks (basaltic clinkstone, porphyry, etc.) ; 2nd, alterna- 
tions of coarse grits and sandstone, with large Araucarites and other plants ; 
and 3rd, of bituminous schists, in parts containing coal, with some layers 
of limestone, copper-slate, etc., and many fossil fishes in bituminous fiag- 
Btone passing up into red-and-green-spotted sandstones and marls. 
This series of rocks, though subject to local undulations, assumes at 
Liebstadtl a steady dip to the S.E., or away from the Riesengebirge ; this 
is well seen on the railway between Liebstadtl on the S.E. and Serail on 
the N.W., which section was described by the author in detail. The 
igneous rocks, chiefly amygdaloids and porphyries (Melaphyr), occur at 
various horizons in the series, and are supposed to have been, for the most 
part, of contemporaneous formation with the regular aqueous sediments. 
Alluding to the animal remains, as enumerated by Geinitz, the author 
stated that he was disposed to view the group as having chiefly an estuarine 
character, the various sauroid fishes and the coarse conglomerates leading 
to that inference ; at the same time he admits that portions of it were pro- 
bably freshwater and terrestrial accumulations. After pointing out the 
chief localities of the large fossil stems of the Araucarites and other plants, 
allusion was made to the opinion of Goppert and Geinitz, that the fauna of 
this group is, as a whole, distinct from that of the carboniferous age. He 
shows that the thickness of the whole of these rocks in Northern Bohemia 
is very considerable. At Erlbach, in the adjacent country of Saxony, 
the inferior half only of these deposits, or the lower Rothliegende, has 
actually been sunk through by a shaft, in search of coal, to the depth of 
23'JO feet, as brought to his notice by Professor Keilhau. 
in referring to the general relations of these rocks, he suggests that, as 
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