Reports and Proceedings—Geological Society of London. 381 
of the fauna in the brackish Tertiary strata of Lower Bavaria, 
illustrated by a plate; Dr. Leppla writes on the Bunter Sandstone 
in the Haardtgebirge, and also, in association with A. Schwager, on 
the Nephelin-Basalt of Oberleinleiter ; Dr. H. Thiirach reviews the 
divisions of the Keuper in Northern Franconia as compared with 
those of adjoihing areas; and Prof. v. Giimbel contributes some very 
interesting supplementary notes to the geology of the Bavarian 
Alps. In one of these he calls attention to the succession of Cre- 
taceous beds in the Algiuer Alps, and mentions that an important 
deposit of green sandstone exposed on the border of the Illerthal, 
‘which had been regarded by Murchison in 1849 as a passage-bed 
between the Cretaceous and Eocene Nummulitic strata, had been 
proved, by the fossils lately discovered in it by Prof. v. Zittel, to 
belong to a distinct horizon of the Upper Chalk not hitherto known 
in the district. Gtimbel also confirms the discovery, first made by 
Professor Penck, of the interglacial age of the beds of brown coal 
near Sonthofen, which have been deposited between two beds of 
boulder material with striated erratics. ‘The coal is now extensively 
worked for fuel. A peculiar feature of some of the erratic boulders 
is that they are now completely hollow. They appear to have been 
originally of dolomite, and by the action of carbonated water the 
inner portions have been dissolved and removed, leaving only a hard 
surface crust. 
Another interesting fact in connection with the Algauer Alps is 
that certain crystalline schists exposed in the Rettenschwanger Thal, 
which have been hitherto regarded as of the age of the Bunter Sand- 
stone, now prove to be Archean, and indicate the existence of a 
ridge of these old rocks on the margin of the Alps. 
Prof. Giimbel further points out that the springs of petroleum 
which have long been known on the western slopes of the Tegernsee 
are probably derived from dark bituminous shales, filled with fish 
remains, which occur in the Hauptdolomite. The shales are 
economically worked for asphalt at Seefeld, but the borings for oil 
at the Tegernsee have been unsuccessful, only small quantities 
having been met with. G. J. H. 
IRIS Osis) PNANjAb) ISAS 4OSp asa DAaN eis. 
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GroLtocicaL Society or Lonpon. 
I.—May 8, 1889.—W. T. Blanford, LL.D., F.R.S., President, in 
the Chair.—The following communications were read :— 
1. “The Rocks of Alderney and the Casqueis.” By the Rev. 
Edwin Hill, M.A., F.G.S. 
The author in this paper described Alderney, Burhou, with its 
surrounding reefs, and the remoter cluster of the Casquets, all 
included within an area about 10 miles long. 
Alderney itself consists in most part of crystalline igneous rocks, 
hornblendic granites of varying constitution which resemble some 
Guernsey rocks, but seem more nearly connected with those of 
