272 Reports and Proceedings. 
REPORTS AND PROCEEDINGS. 
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GeroLocicaL Society or Lonpon.—I. April 26; W.J. Hamilton, 
Esq., President, in the chair. The following communications were 
read:—l. ‘On the Character of the Cephalopodous Fauna of the 
South Indian Cretaceous Rocks.’ By Dr. F. Stoliezka. Communi- 
cated by the Assistant-Secretary.—In this paper the author gave a 
summary of the more important facts brought to light by the exa- 
mination of the Cretaceous Cephalopoda of Southern India, which 
was begun by Mr. H. F. Blanford, and continued by himself, giving, 
first of all, a brief notice of what had been done previously by other 
observers, and a sketch of Mr. Blanford’s subdivision of the strata 
into the Ootatoor (or Lower), the Trichinopoly (or Middle), and 
the Arrialoor (or Upper) groups. All the genera characteristic 
of European Cretaceous faunze were stated to be well represented, 
the whole assemblage having a Middle Cretaceous aspect. The 
number of species of the different genera occurring in each of the 
three subdivisions was then given, as also the distribution of the 
groups of the genus Ammonites, the most striking and abnormal 
feature being the intimate association of three species of that genus, 
belonging to the Triassic group ‘ Globosi,’ with true Cretaceous 
fossils. Dr. Stoliczka then discussed the relation of this Indian 
fauna to those of the European Cretaceous rocks, and illustrated his 
remarks by a table showing the geological range in India and in 
Europe of the species that are common to both areas, He came 
to the conclusion that for the present the lowest of Mr. Blanford’s 
subdivisions (the Ootatoor group) may be considered to be of the 
age of the European Gault; while the uppermost (the Arrialoor 
group) does not seem to correspond to a higher division than 
D’Orbigny’s Sénonien. 
2. ‘On the Growth of Flos Ferri, or Coralloidal Aragonite.? By 
W. Wallace, Esq. Communicated by W. W. Smyth, Esq., F.R.S., 
Sec. G.S.—The author first described the physical features of the 
Mountains in Westmoreland, and endeavoured to show that they 
bore certain relations to the geological structure of the country, and 
that the number and size of the joints varied with the elevation of 
the rocks, and their position in relation to the valleys. After the 
formation of the joints, the minerals occurring in the veins in their 
neighbourhood were stated to be acted upon by decomposing agents, 
and it was therefore inferred that the amount of decomposition in 
veins and in rocks is proportional to the amount of their elevation 
above the sea. 
Mr. Wallace then stated that Aragonite is produced only after the 
strata are traversed by joints, and that the branched Aragonite very 
rarely occurs, being found only in caverns and old workings. ‘Two 
of these caverns have come under his notice, and were described 
in detail; one of them is in the north vein of the Silver Band Mine, 
and the other near one of the principal veins of the Dufton Fell 
Mine. Finally, he discussed the causes and conditions necessary to 
