No. 609. 



Decade VI.— Vol. II.— No. II, 



Price 2s. net. 



THE 



GEOLOGICAL MAGAZINE 



JfHonthiu Journal of deologg. 



WITH WHICH IS INCORPORATED 



THE GEOLOG-IST. 



EDITED BY 



HENRY WOODWARD, LL.D., F.R.S., F.G.S., &c. 



ASSISTED BY 



Professor J. W. GREGORY, D.Sc, F.R.S., F.G.S. 

 Dr. GEORGE J. HINDE, F.R.S., F.G.S. 

 Sir THOMAS H. HOLLAND, K.C.I E., A.R.C.S., D.Sc, F.R.S , F.G.S. 

 Dr. JOHN EDWARD MARR, M.A., Sc.D. (Camb.), F.R.S., F.G.S. 

 Dr. J. J. H. TEALL, M.A., Sc.D. (Camb.), LL.D,, F.R.S. , F.G.S. 

 Professor W. W. "WATTS, Sc.D., M.Sc, F.R.S.. Vice-Pees. Geol. Soc. 

 Dr. ARTHUR SMITH WOODWARD, F.R.S.,' F.L.S., Pres. Geol. Soc. 



MARCH, 1915: 



OOKTBNTS. 

 LONDON: DULAU & CO., Ltd., 37 SOHO SQUARE, W. 



I. Original Articles. Page 



On Schlotheimia Greenouglvi, J. 

 Sowerby, sp. By L. F. Spath, 

 B.Sc, F.G.S. (Plate IV.) ... 97 



Radio-activity and the Earth's 

 Thermal History. By ARTHUR 

 Holmes, A.R.C.S., D.I.C., 

 B.Sc, F.G.S. {Concluded.) ...102 



Palaeozoic Fossils referred to the 

 Cirripedia. By T. H. WITHERS, 

 F.G.S. (With Page block.) ... 112 



The Laterites of French Guinea. 

 By L. Leigh Fermor, D.Sc, 

 F.G.S. {Concluded.) 123 



II. Reviews. 



Guide to Fossil Remains of Man. 



By Dr. A. S. Woodward, F.R.S. 129 

 Transport by Running Water. By 



G.K.Gilbert -...132 



Great Eruption of Stromboli. By 



Frank A. Perret 134 



Reviews {continued). Page 



Geology of New South Wales. By 

 C. A. Sussmilch, F.G.S 134 



Brief Notices : The Production of 

 Graphite — Useful Minerals of 

 United States — Report of Geo- 

 logical Survey, Ottawa — Ore 

 Deposits of N.E. Washington — 

 Electric Activity in Ore Deposits 136 



III. Reports and Proceedings. 



Geological Society — 

 February 3, 1915 



Mineralogical Society- 

 January 26, 1915 



137 



139 



IV. Obituary. 



Arthur Roope Hunt, M.A. (Cantab.), 

 F.L.S., F.G.S 140 



Frederick William Rucller, I.S.O., 

 F.G.S 142 



BgsT The Volume for 1914 of the GEOLOGICAL MAGAZINE is ready, 

 price 26s. net. Cloth Cases for Binding may be had, price Is. 6d. net. 



