﻿xii 



ANNIVERSARY MEETING. 



1850. 



May 8th. — On some Fossil Plants from the Lower Lias, by Professor 



James Buckman, F.G.S. 

 . On Dudley Trilobites, Part % by T. W. Fletcher, 



Esq., F.G.S. 



May 22nd. — On a Gap in the Greywacke Formation of the Eastern 

 Lammermuirs, filled with Old Red Sandstone Conglomerate, by 

 W. Stevenson, Esq. ; communicated by Sir R. I. Murchison, 

 V.P.G.S. 



— On the Stratified Formations of the Venetian Alps, 



by Signor Achille de Zigno; communicated by Sir R. I. Mur- 

 chison, V.P.G.S. 



On the Limestone of Nash, near Presteign, South 



Wales, by J. E. Davis, Esq., F.G.S. 

 June 5th. — On British Fossil Lepadidae, by Charles Darwin, Esq., 



F.G.S. 



~. On the Diluvia and Valleys of the neighbourhood of 



Bath, by C. H. Weston, Esq., F.G.S. 

 On the Tertiary Strata and their Dislocations in the 



environs of Blackheath, by the Rev. H. M. De la Condamine ; 



communicated by Sir H. T. De la Beche, V.P.G.S. 

 . On the occurrence of a Freshwater Marl in the Fens 



of Cambridgeshire, by W. J. Hamilton, Esq., Sec.G.S. 

 June 19th. — On a Section of the Lower Greensand, at Seend, near 



Devizes, by William Cunnington, Esq.; communicated by Joseph 



Prestwich, jun., Esq., F.G.S. 

 On the Age and Position of the Fossiliferous Sands 



and Gravels of Farringdon, by R. A. C. Austen, Esq., F.G.S. 

 Nov. 6th. — On the Microscopical Structure of the Calcareous Grit 



of Yorkshire, by H. C. Sorby, Esq., F.G.S. 

 On the Porphyry of Belgium, by Professor A.Delesse; 



communicated by the President. 

 On the Rose-coloured Syenite of Egypt, by Prof. A. 



Delesse; communicated by the President. 

 The Schistose Rocks of the Forez, in France, shown 



to be of Carboniferous Age, by Sir R. I. Murchison, V.P.G.S. 

 Nov. 20th. — Report on the occurrence of an Earthquake at Brussa 



(forwarded from the Foreign Office, by order of Viscount Pal- 



merston). 



■ Generalizations respecting the Erratic Tertiaries of 



Norfolk, by Joshua Trimmer, Esq., F.G.S. 

 On the Erratic Tertiaries of the Valley of Gayton- 



thorpe, by Joshua Trimmer, Esq., F.G.S. 

 — On the Origin of the Soils of a part of Kent, by 



Joshua Trimmer, Esq., F.G.S. 

 Description of the Limestone Quarry at Linksfield, 



Elgin, by Capt. T. R. L. Brickenden, F.G.S. 

 Dec. 4th. — On the Geology of the Upper Punjaub and Peshaur, by 



Major N. Vicary ; communicated by Sir R. I. Murchison, V.P.G.S. 

 ■ On the Silurian Rocks of Dumfriesshire and Kirk- 



