No. 538. 



Decade V.— Vol. VI.— No. IV. 



Price Is. 6d. net. 



THE 



GEOLOGICAL MAGAZINE 



OR 



^tonthln Journal of feologi). 



WITH WHICH IS INCORPORATED 



THE GrEOLOGrlSO?. 



EDITED BY 



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



ASSISTED BY 



Dr. GEORGE J. HIXDE, F.R.S., &c., and HORACE B. WOODWARD, F.R.S., &c. 



APRIL, 1909. 



OOn^TElsTTS 



I. Original Articles. Pago 



Secular Earth- Creep. By Professor 

 E. H. L. ScHM'AHz, A.R.C.S., 

 F.G.S., Rhodes ruiversity College, 

 Grahamstowu. (With a Test-map.) 145 



The Jaws of Discoidea cylindrica. 

 By Herbert L. Hawkins, B.Sc. 

 (Plate yi.) US 



' Borolanite ' from Eoss-shire. By 

 W. Campbell Smith, Corpus 

 Christ! College, Cambridge ... . . 152 



Coal Pebble in a Coal-seam. ByW. S. 

 Gresley, A.M.I.C.E., F.G.S. ... 157 



Source of Limestone Pebbles in the 

 Buuter of West Somerset. By 

 Edgar C. Martin, B.Sc, A.I.C. 

 (With a Page-map.) 160 



Corundum in Rliodesia. By F. P. 

 Mennell, F.G.S. (With a Micro- 

 scopic Section.) 166 



Phacops Icevis (Miiust.). By lyoR 

 Thomas, Ph.D., F.G.S 167 



Well -section at Ware House, Lyme 

 Eegis. By A. C. G. Cameron ... 169 



II. Notices of Memoirs. 



Discovery of Trias in the Caucasus. 

 Translated from the Russian by 

 Dr. Felix Oswald, F.G.S. ^. ...171 



Bibliography of Mexican Geology ... 173 



174 

 176 

 178 



III. Reviews. Page 



J. Harrison's Geology of Goldfields, 

 British Guiana 



Dr. Hatch's Text-Book of Petrology 



Geology of Oban and Dalmally 



Water Supply of Kent, Bedfordshire, 

 and Northamptonshire 



Centenary of Geological Society, 

 London 



IV. Reports and Proceedings. 



Geological Society of London — • 

 Annual General Meeting, February 19, 

 1909 182 



V. Correspondence. 



Professor T. G. Bonney, F.R.S. 

 Mr. R. M. Brvdone, F.G.S. ... 

 Mr. Bernard Hob.son, F.G.S. ... 



VI. Obituary 



Perceval de Loriol le Fort 



Hugh Leonard 



James Parsons 



VII. Miscellane 



Wayuflete Professorship of Mineralo, 

 Oxford 



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^° The Volume for 1908 of the GEOLOGICAL MAGAZINE is ready, 

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