4 PBOCEEBINGS OF THE GEOLOGICAL SOCIETY. 



very variable in different portions of the " reef," samples with 

 from 3 oz. to | oz. per ton occurring in close proximity. So far as 

 observation has gone (and the deepest workings have only reached 

 a depth of from 70 to 150 feet), the yield of gold has generally 

 increased as the reefs are followed downwards. 



Discussioif. 



Prof. T. EuPERT Jones said the interesting question was the mode 

 of occurrence of the gold, whether in the pebbles, which are of white 

 and dark-grey quartz, or in the matrix of this almondrock-like 

 " banket." On this point further information was desirable. 



2. " On the Age of the Altered Limestone of Strath, Skye." By 

 Dr. Archibald Geikie, F.R.S., Y.P.G.S. 



3. " On the Discovery of Trilobites in the Upper Green (Cam- 

 brian) Slates of the Penrhyn Quarry, Bethesda, near Bangor, North 

 Wales." By Dr. Henry Woodward, P.R.S., V.P.G.S. 



4. " On Thecospondylus Daviesi, Seeley, with some Remarks on 

 the Classification of the Dinosauria." By Prof. H. G. Seeley, 

 F.R.S., F.G.S. 



The following specimens were exhibited : — 



Specimens exhibited by Dr. Archibald Geikie, P.E-.S., Y.P.G.S., 



in illustration of his paper. 



Three specimens of ConocorypTie viola, exhibited by Dr. Henry 

 Woodward, r.E.S., Y.P.G.S., in illustration of his paper. 



December 21, 1887. 

 Prof. J. W. JuDD, F.P.S., President, in the Chair. 



Joseph Carl August Hall, Esq., Grosvenor House, Swansea ; 

 Edward Wilton Newton, Esq., 4 Cross Street, Camborne, Cornwall ; 

 and James WiHiam Stroud, M.D., Port Elizabeth, Cape Colony, 

 South Africa, were elected Fellows of the Society. 



The List of Donations to the Library was read. 



The President announced that the Fourth Meeting of the Inter- 

 national Geological Congress will be held in London in September 

 next on the 17th and following days. An Organizing Committee 

 has nominated the following Officers : — Honorary President : Prof. 

 T. H. Huxley, D.C.L., LL.D., F.B.S. President : Prof. J. Prest- 



