vol, 50.] pkoceedings of the geological society. 3 



Discussion. 

 The Peesident and Prof. Judd spoke. 



The following specimens were exhibited : — 



Kock-specimens exhibited by Prof. W. C. Brogger, For.Memb.G.S., 

 in illustration of his paper. 



Specimens and microscope-sections, exhibited by Frank Rutley, 

 Esq., F.G.S., in illustration of his paper. 



Specimens and microscope-sections, exhibited by Prof. H. J. 

 Johnston-Lavis, M.D., F.G.S., in illustration of his paper. 



A new mineral found at Greenbushes, Bunbury, Western Aus- 

 tralia, associated with alluvial Cassiterite, exhibited (with analysis) 

 by F. Danvers Power, Esq., F.G.S. 



December 6th, 1893. 

 W. H. Hudleston, Esq., M.A., F.R.S., President, in the Chair. 



Henry Dyke Acland, Esq., Great Malvern ; John Forbes Bryant, 

 Esq., B.A., Clare College, Cambridge ; David Draper, Esq., Lennox- 

 ton, Newcastle, Natal ; Gavin H. Jack, Esq., 10 Pennel Square, 

 Pontypridd, South Wales ; Septimus Bleslop, Esq., Asansol, E.I.R., 

 India ; James Henry Howarth, Esq., The Crescent, Newton Park, 

 Leeds ; William Humble, Esq., Wickham, Newcastle, New South 

 Wales ; Arthur Walton Rowe, Esq., M.S., M.B., M.B.C.S., 1 Cecil 

 Street, Margate ; Joseph Scott, Esq., Newcastle Street, Stockton, 

 New South Wales ; William Simpson, Esq., Savile Mount, Halifax ; 

 Victor Streich, Esq., care of Messrs. Harrold Brothers, Adelaide, 

 South Australia ; John James Turnbull, Esq., Giridih, E.I.R., 

 Bengal, India ; and Albert Wilmore, Esq., Trawden, Colne, Lanca- 

 shire, were elected Fellows of the Society. 



The List of Donations to the Library was read. 



In explanation of a specimen exhibited by F. B. Du Pre, Esq., 

 M.A., F.G.S., Mr. Hoea.ce W. Monckton remarked that the 

 specimen came from a dyke in the Brockwell Seam at the Crox- 

 dale Colliery, about 2 miles south of Durham, depth 80 fathoms. 

 This is probably the dyke described by Mr. Teall as 2 miles north 

 of the Hett Dyke (' Brit. Petrography,' p. 202). The greater part 

 of the rock is composed of lath-shaped plagioclase-felspar ; the 

 remainder appears to be augite, or change-products after augite, and 

 iron oxide. 



The following communications were read : — 



1. ' The Purbeck Beds of the Vale of Wardour.' By the Rev. W. 

 R. Andrews, M.A., F.G.S., and A. J. Jukes-Browne, Esq., B.A., 

 F.G.S. 



2. ' On a Picrite and other associated Rocks at Barnton, near 

 Edinburgh.' By Horace W. Monckton, Esq., F.L.S., F.G.S. 



