188 Reports and Proceedings — 



discovered of any volcanic rocks intercalated among the Secondary 

 forniations of this country, so that the whole of the vast interval of 

 the Mesozoic period was a prolonged time of quiescence. At last, 

 when the soft clays and sands of the Lower Tertiary deposits of the 

 South-east of England began to be laid down, a stupendous series 

 of fissures was opened across the greater part of Scotland, the North 

 of England, and the North of Ireland. Into these fissures lava rose, 

 forming a notable system of parallel dykes. Along the great hollow 

 from Antrim northwards, between the Outer Hebrides and the main- 

 land of Scotland, the lava flowed out at the surface and formed the 

 well-known basaltic plateaux of that region. 



The address concluded with a summary of the more important 

 facts in British volcanic history bearing on the investigation of the 

 nature of volcanic action. Among these the President laid special 

 stress on the evidence for volcanic periods, during each of which 

 there was a gradual change of the internal magma from a basic to 

 an acid condition, and he pointed out how this cycle had been 

 repeated again and again even within the same limited area of 

 eruption. In conclusion, he dwelt on the segregation of minerals 

 in large eruptive masses and indicated the importance of this fact 

 in the investigation, not only the constitution and changes of the 

 Tolcanic magma, but also of the ancient gneisses where what appear 

 to be original structures have not yet been effaced. 



The Ballot for the Council and Officers was taken, and the following were duly 

 elected for the ensuing year: — Council: Prof. J. F. Blake, M.A. ; Prof. T. G. 

 Bonney, D.Sc, LL.D., F.R.S. ; James W. Davis, Esq., F.L.S., F.S.A. ; R. 

 Etheridge, Esq., F.R S. ; L. Fletcher, Esq., M.A., F.R.S. ; Prof. C. Le Neve 

 Foster, D.Sc, B.A. ; Sir A. Geikie, D.Sc, LL.D., F.R.S. ; Alfred Barker, Esq., 

 M.A. ; H. Hicks, Esq., M.D., F.R.S.; G. J. Hiude, Esq., Ph.D.; W. H. 

 Hudleston, Esq., M.A., F.R.S. ; Prof. T. McKenny Hughes, M.A., F.R.S. ; J. W. 

 Hulke, Esq., F.R.S.; Prof. J. W. Judd, F.R.S.; J. E. Marr, Esq., M. A., F.R.S.; 

 H. W. Monckton, Esq. ; Clement Reid, Esq., F.L.S.; J. J. H. Teall, Esq., M.A., 

 F.R.S. ; W. Topley. Esq., F.R.S. ; Prof. T. Wiltshire, M.A., F.L.S. ; Rev. H. H. 

 Winwood, M.A. ; H. Woodward, Esq., LL.D., F.R.S. ; H. B. Woodward, Esq. 



Ovmc-E-RS.— President : W. H. Hudleston, Esq., M.A., F.R S. Vice- Presidents ; 

 Prof. T. G. Bonney, D.Sc, LL.D., F.R.S.; L. Fletcher, Esq.; M.A., F.R.S.: 

 G. J. Hinde, Esq., Ph.D.; Prof. J. W. Judd, F.R S. Secretaries: H. Hicks, 

 Esq., M.D., F.R.S.; J. E. Marr, Esq., M.A., F.R.S. Foreign Secretary: J. W. 

 Hulke, Esq., F.R.S. Treasurer: Prof. T. Wiltshire, M.A., F.L.S. 



The thanks of the Fellows were unanimou-sly voted to the retiring Members of 

 Council: Dr. W. T. Blanford, Dr. J. Evans, James Carter, Esq., J. C. Hawkshaw, 

 Esq., and F. W. Rudler, Esq. 



IL— February 24, 1892.— W. H. Hudleston, Esq., M.A., F.E.S., 

 President, in the Chair. — The following communications were read : 



1. "The Raised Beaches, and 'Head,' or Rubble-Drift, of the 

 South of England; their Relation to the Valley-Drifts and to the 

 Glacial Period ; and on a late Post-Glacial Submergence. — Part II." 

 By Joseph Prestwich, D.C.L., F.R.S., F.G.S. (For Part I. see p. 136.) 



The ossiferous deposits of the Caves of Gower are shown to be 

 contemporaneous with the raised sand-dunes betwef*n the beaches 

 and the 'head,' and reasons are given for supposing that the eleva- 

 tion of land which preceded their formation need not necessarily 

 have been greater than 120 feet. The mammalian fauna of these 



