XCviii PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Aug. 19OI. 



The Names of certain Fellows of the Society were read out for 

 the second time, in conformity with the Eye-Laws, Sect. VI. Art. 5, 

 in consequence of the non-payment of the Arrears of their Contri- 

 butions. 



The List of Donations to the Library was read. 



The following communications were read : — 



1. 'On the Use of a Geological Datum.' By Beeby Thompson, 

 Esq., F.G.S., F.C.S. 



2. ' On Intrusive, Tuff-like, Igneous Eocks and Breccias in Ireland.' 

 By James E. Kilroe, Esq., and Alexander McHenry, Esq., M.E.I.A.^ 

 (Communicated by E. S. Herries, Esq., M.A., Sec.G.S.) 



The following specimens were exhibited : — 



Eock-specimens of Tuff-like Igneous Eocks from Ireland, exhibited 

 by J. E. Kilroe, Esq., and A. McHenry, Esq., M.E.I. A., in illus- 

 tration of their paper. 



Drift-worn Palaeolithic Implement found at Orpington (Kent), 

 exhibited by George Clinch, Esq., F.G.S. 



Eock-specimens from the Salcombe district (South Devon), show- 

 ing crumpling and folding, exhibited by William P. D. Stebbing, 

 Esq., F.G.S. 



^ Communicated by permission of the Director of H.M, Geological Survey. 



