PEOCEEDZN-GS OF THE GEOLOGICAL SOCIETY. 5 



The following name of a Fellow of the Society was read out for 

 the first time in conformity with the Bye-Laws (Sect. VI. B, Art. 6), 

 in consequence of the non-payment of the arrears of his contri- 

 bution : — J. T. Dawes, Esq. 



The following communications were read : — 



1. "On the Lower Eocene section between Eeculvers and Heme 

 Bay, and on some modifications in the classification of the Lower 

 London Tertiaries." By J. S. Gardner, Esq., E.G.S. 



2. " On Mr. Dunn's Notes on the Diamond-fields of South Africa, 

 1880." By Francis Oats, Esq., E.G.S. 



The author referred to the hypothesis put forward in 1880 by 

 Mr. Dunn (Quart. Journ. Geol. Soc. vol. xxxvii. p. 609), that the carbon 

 for the production of the South-African diamonds was furnished by 

 the black carbonaceous shales found throughout the district, and the 

 conclusion drawn by him therefrom that therefore diamonds would 

 not be found below the level of these shales. The author stated 

 that the shales, so far as he knows, do not occur below 270 feet, 

 whilst the ground is successfully worked for diamonds at a depth of 

 350 feet. He maintained that the carbonaceous shales have nothing 

 to do with the origin of the diamonds, and stated that the " craters " 

 containing the diamantiferous rock erupted quite different material 

 at an earlier date ; and he instanced the occurrence in the Kimberley 

 mine of a mass of " dolerite " between the diamantiferous ground 

 and the surrounding shales. 



The following specimens were exhibited : — 



Specimens of quartz with gold, from the Sierra Buttes Mine, Cali- 

 fornia, exhibited by E. Tendron, Esq., E.G.S. 



A Pema and other fossils from the lowest division of the Wool- 

 wich and Reading Bottom Bed, in the Croydon section of the Wood- 

 side and East Grinstead Eailway, exhibited by H. M. Klaassen, Esq., 

 E.G.S. 



A specimen from the Oxford Clay, exhibited by T. J. George, Esq., 

 E.G.S. ; and 



A series of fossils, exhibited by J". S. Gardner, Esq., E.G.S., in 

 illustration of his paper. 



VOL. xxxix. 



