No. 656. 



Decade VI.— Vol. VI No. II. 



j j a »q y vl 



Price 2s. 



Th< 



Geological Magazine 



Oil 



flf>ontbl\> 3onrnal of tBcoloov*. , 



WITH WHICH IK INCOIil'OJtATI'.ll 



>nmn 



THE GEOLOGIST,/*?* 



kdixed by (^ FEB 2 4 1Q1Q 



NRY WOODWARD, LL.D., F.l\s. 



AND \. / T,-) i , 



R. H. R A STALL. M.A., F.G.S 



? *'nrt%\ Wns^ 



JSSIBTEI) F.Y 



Prof. J. W. GREGORY, D.SC, F.R.S. | Sin JETHRO J. H. TKAIJ,, Se.D., F.R.S. 



Sir'!'. H. HOLLAND, K.C.I.E.. D.Sc, F.R.S. I Prof. W. W. WATTS, Sc.D., F.R.S. 

 Prof. J. E. MARR, SC.D., F.R.S. DR. A.SMITH WOODWARD, F.R.S. 



FEBRUARY, 1919. 



CONTENTS:— 



I. Original Articles. Page 



Palaeolithic Flint Implements from 

 High Level Terraces of Thames 

 Valley. By Henry Dewey, 

 F.G.S., of H.M. Geological 

 Survey. (Plate II.) 49 



Climate and Time. By 11. M. 

 Deeley, V.P.G.S ' 57 



Quartzose Conglomerate at Caldon 

 Low. Staffs. By J. Wilfrid 

 Jackson, F.G.S., and W. E. 

 Alkins, B.Sc 59 



Notes on Ammonites. By L. F. 

 Spath. B.Sc., F.G.S 65 



Notes on Yunnan Cystidea. Part HI. 

 By F. A. Bather, D.Sc, F.B.S. 71 



The Carboniferous Limestone of 

 the Wrekin. By L. M. Parsons, 

 M.Sc, F.G.S. (With a Sketch- 

 man.) 77 



II. Reviews. 



Dr. G. Hickling : Geology of Man- 

 chester 81 



J. W. Jackson: Facetted Pebbles 

 in Glacial Deposits 82 



S. S. Buckman : Yorkshire Type 

 Ammonites 82 



W. Whitaker and J. C. Thresh : 

 Water Supply of Essex 82 



Dr. A. W. Rogers: Geology of 

 South Africa 83 



•I. Cojjgin Brown : Cassiterite of 

 Tavoy 83 



Reviews (continued). Page 

 M. E. Wilson : Timiskaming Co., 



Quebec, Canada 84 



W. A. Johnston : Rainy River, 



Ontario 85 



Canada, Department of Mines, 



Ottawa 85 



South Australia, Department of 



Mines, Adelaide 86 



Permian Insects, Sydney, New 



South Wales 87 



.1. Allan Thomson : Dystrophic 



Considerations 87 



III. Reports and Proceedings. 



The Royal Society 88 



Geological Society of Loudon - 



December 4, 1918 88 



December 18 89 



Edinburgh Geological Society 91 



IV. CORRESPON DENCE. 



Dr. F. R. Cowper Reed 92 



B. H. Rastall -.... 93 



V. Obituary. 



Dr. G. Kail Gilbert 94 



.). P. Johnson 95 



VI. Miscellaneous. 



Sir Aubrey Strahan, K.B.E 95 



Diamonds, South Africa 95 



A ward of Medals, Geological Society 9(> 



Pulcrus of Borne 96 



J 



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