146 Dr Boue’s Geological Comparative View of the 
and sometimes marly sandstone ; then chloritic white limestone, 
and ferruginous sandstones, in which the globules of hydrate of 
iron are often abundant enough to be wrought (Sonthofen, 
Kressenberg). With this last alternates a nummulitic brown- 
ish compact limestone , and then come above all some chloritic 
chalky limestone , and the greyish chalk marl. Some thin 
beds of clay, which are sometimes bituminous, are interstrati- 
fied with these masses ; even some few pieces of lignite and 
bitumen have been found in the ferruginous sandstone, and also 
rarely the same fossil resin as in France. Petrifactions are 
abundantly distributed in this formation, and can be referred to 
twenty-two genera of Lamarck’s shells, as Belemnites, Cones, 
Murices, &c. There are Ananchites, Serpulites, and crabs, as 
in France and Hanover. Schlotheim has described nearly all 
these petrifactions as coming from Bergen and Coburg. 
The great tertiary basin of Bavaria and Swabia presents 
two regions, the Southern and the Northern. In the southern, 
the molasse, and nagelfluh limestone abound ; and in the north- 
ern, sandstone, and less quartzose nagelfluh, in which green 
particles are visible, and the formation is capped with a thin co- 
vering of chloritose coarse marine limestone (Eckmuhl). In the 
south, the lower part of the molasse deposit is more compact 
and calcareous, and in its upper part becomes more marly, 
and finer in the grain. Here and there are deposits of lignite 
with palmacites ; and fresh-water shells, Planorbes (Ammonites 
of Flurl), Lymnese, Mytili ? Cyrenes, Anodonta, and Cerithia 
like fresh-water univalves, have been deposited in cavities of the 
molasse, by alpine debacles of lakes and rivers. 
Local deposits from the waters of springs, of Calcareous Tuff a, 
with many land and marsh shells, Lymnese, Planorbes, Helices, 
Paludinae, are seen here and there, and seem to have been 
formed, in part, during the formation of the great alluvium 
which covers the molasse, and forms especially the soil of the 
middle plains of Bavaria. Others are still forming, but they 
do not present the particular stratified structure of these tuffas 
called travertino. 
On comparing this deposit with that of Switzerland, we find 
that it is pretty similar ; yet it wants the marine shelly molasse of 
St Gallen, which evidently belongs to the coarse marine lime- 
