No. 666. 



Vol. LVI of Whole Series. 



Price 2s. 



Th< 



Geological Magazine 



f|[>ontbl\> 3ournal of (Beoloay. 



WITH WHICH IS INCORPORATED 



THE GEOLOGIST. 



EDITED BY 



HENRY WOODWARD, LL.D., F.R.S. 



AN'D 



R. H. RASTALL, M.A. 



ASSIST1CI) BY 



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



F. H. HATCH, Ph.D., M.Inst. M.M. Prop. W. W. WATTS, Sc.D., F.R.S. 



Prof. J. E. MARR, Sc.D., F.R.S. HENRY WOODS, M.A., F.R.S. 



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



DECEMBER, 1919. 



CONTENTS :- 



Page 

 . 529 



Editorial Notes 



Original Articles. 

 Bunaia Woodwardi. By Dr. J. M. 



Clarke. (With Plate XIV.) ... 531 

 Geology of the Isle of Purbeck. 



By Sir A. Strahan 538 



The Origin of Cretaceous Flint. 



By W. A. Eichardson. (With 



4 Text-figures. ) 535 



Correlation of Devonian Pucks of 



North Devon. By Dr. J. W. 



Evans 547 



Palasozoic Hydroids from Victoria. 



By F. Chapman and E. W. 



Skeats. (With Plate XV.) '550 



Articles {continued) . Page 

 Address to Section C, British 

 Association. By Dr. J. W.Evans. 

 (Concluded.) '...:. 551 



Beyiews. 



Shores and Shorelines 563 



Thrust-planes in the Himalayas ... 565 



Magnesite in West Australia 565 



Reports and Proceedings. 



Geological Society of London 566 



Mineralogical Society 567 



Correspondence. 



H. J. Lowe 368 



Index, etc 569 



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