186 Reports and Proceedings — Geological Society of London. 



deposit; to the differences in character of the deposits owing to 

 various local conditions ; to accumulation of contemporaneous 

 volcanic material ; to variations in the nature of the earth-move- 

 ments ; to changes in the nature of the included organisms ; and 

 lastly to climatic changes, and proceeded to consider the significance 

 of these records as bearing upon the classification of the sediments. 



He advocated the adoption of a triple classification, such as had 

 been already tacitly adopted in the case of some of the sediments, 

 as, for instance, those of Jurassic age, where divisions were made 

 according to (i) lithological change, (ii) organic change, and 

 (iii) time ; and pointed out how such a classification could be adopted 

 without any violent changes in an existing nomenclature or in the 

 rules of priority. 



He illustrated the suggested changes by a more detailed discussion 

 of the classification of tlie Ordovician strata, and pointed out that we 

 had names whicli might be used with chronological significance in 

 the case of the divisions of the rocks of most of the great systems; 

 and maintained that, as our knowledge increased, we could refer 

 beds of new areas to their places among the different series marking 

 periods of time with a confidence similar to that with which we 

 have long assigned strata of remote regions to one or other of the 

 great systems. 



The ballot for the Councdl and Officers was taken, and the following were declared 

 duly elected for the ensuing year: — Council: F. A. Bather, M.A., D.Sc. ; W. T. 

 Blanford, C.I.E., LL.D., F.li.S. ; Professor T. G. Bonney, Sc.D., LL.D., F.E.S., 

 F.S.A. ; Sir John Evans, K.C.B., D.C.L., LL.D., F.R.S. ; Professor E. J. 

 Garwood, M.A. ; Sir Archibald Geikie, Sc.D., D.C.L., LL.D., Sec.R.S. ; R. S.. 

 Harries, M.A. ; Professor J. W. Judd, C.B., LL.D., V.P.R.S. ; Profes.sor Percy F. 

 Kendall ; Philip Lake, M.A. ; Professor Charles Lapworth, M.Sc, LL.D., F.E..S. ^ 

 Eichard Lydekker, B.A., F.R.S. ; Bedford McNeiU, Assoc. E.S.M. ; J. E. MaiT, 

 Sc.D., F.E.S. ; Professor H. A. Miers, M.A., F.R.S. ; H. W. Monckton, F.L.S. ; 

 F. W. Eudler, I.S.O. ; L. J. Spencer, M.A. ; Aubrey Strahan, M.A., F.R.S. ; 

 C. Fox Strangwavs; Professor W. W. Watts, M.A., M.Sc, F.R.S.; the Rev. 

 H. H. Winwood, M.A. ; and H. B. Woodward, F.R.S. 



Officers: — President: J. E. Marr, Sc.D., F.R.S. Vice-Presidents: Professor 

 T. G. Bonney, Sc.D., LL.D., F.R.S., F.S.A. ; R. S. Herries, M.A. ; Professor 

 Charles Lapworth, M.Sc, LL.D., F.R.S.; and H.B.Woodward, F.R.S. Secretaries: 

 Professor E. J. Garwood, M.A., and Professor W.W. Watts, M.A., M.Sc, F.R.S. 

 Foreign Secretary : Sir John Evans, K.C.B., D.C.L., LL.D., F.R.S., F.L.S. 

 Treasiirer: W. T. Blanford, CLE., LL.D., F.R.S. 



IL— February 22nd, 1905.— J. E. Marr, Sc.D., F.E.S., President, 



in the Chair. 

 Dr. F. A. Bather exhibited a series of Danish rocks ^ illustrating r 



(1) The share that Echinoderms may take in rock-building; 



(2) The transition from the Secondary to the Tertiary Era in 



the Baltic basin near Denmark ; 



(3) The special conditions at the close of the Glacial Period, in 



the limited area where alone these rocks are now found 

 as erratic blocks. 



1 The rocks have been described in papers by K. A. Gronwall: Danmarks geoL. 

 Undersog. II, Rsekke, No. 15 ; Medd. Dansk geol. Foren., vol. x, p. 1 ; and Jahrb. 

 Preuss. geol. Landesaust., vol. xxiv, p. 420 — all in 1904. Also by W. Deecke,, 

 Mitth. naturwissench. Ver. Neuvorponimern, vol. xxxi (1899), p. 67. 



