No. 659. 



Decade VI— Vol. VI— No. V. 



Price 2s. 



The 



Geological Magazine 



flDontbl\> 3ournal of (Seologv. 



WITH WHICH IS INCORPORATED 



THE GEOLOGIST. 



EDITED BY 



HENRY WOODWARD, LL.D., F.R.S.\^ HlW 2 ' 

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



ASSISTED BY 



Pbof. J. W. GREGORY, D.Sc, F.R.S. 

 SirT. H. HOLLAND, K.C.I E., ~D.Sc, F.R.S. 

 Prof. J. E. MARR, Sc.D., F.R.S. 



Sir JETHRO J. H. TEALL, Sc.D., F.R.S. 

 Prof. W. W. WATTS, Sc.D., F.R.S. 

 Dr. A. SMITH WOODWARD, F.R.S. 



MAY, 1919. 



CONTENTS:— 



Page 

 Editorial Notes 193 



Original Articles. 



Foliation and Metamorphism. By 

 Professor T. G. Bonney 196 



On the Highest Coal-measures of 

 Durham. By C. T. Trechmann 

 and D. Woolacott 203 



The Minerals of the Lower Green- 

 sand. By B. H. Bastall 211 



Notes on Ammonites. V. By 

 L. F. Spath 220 



Some Becent American Petrological 

 Literature 226 



Beviews. 

 Echinoids from the Bagh Beds ... 229 



Coal in Peru 230 



Mineral Besources of Great Britain 231 



Beviews {continued). Page 



Coal in Holland 232 



Aquamarine in Baltistan 233 



Geology of Gomera (Canaries) 233 



Basalts of Antarctica 234 



Scope of Palaso-ecology 234 



Minerals from British Columbia ... 234 

 Mimetite, Thaumasite, and Wavel- 



lite 235 



Augite from Stromboli 235 



U.S. National Museum 235 



Beports and Proceedings. 



Geological Society of London 235 



Boyal Society 237 



Edinburgh Geological Society 238 



Mineralogical Society 239 



Correspondence. 



J. Beid Moir 240 



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