No. 638. 



Decade VI.— Vol. IV.— No. VIII. 



Price 2s. net. 



THE 



GEOLOGICAL MAGAZINE 



^Honthlij Journal of deologn 



WITH WHICH IS INCORPORATED 



THE GEOLOGIST. 



HENRY 



EDITED BY 



WOODWARD. LL.D.. 



ASSISTED BY 



F.R.S.. F.G.S.. Ac. 



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 , Vice-Pres. 

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

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

 Professor W. W. WATTS, Sc.D. (Camb.), M.Sc, F.R.S., F.G.S. 

 Dr. ARTHUR SMITH WOODWARD, F.R.S., F.L.S., ViCK-Pi 



G.S. 



I. Original Articles. 



Cretaceous Mollusca, New Zealand 

 By C. T. Trechmann, D.Sc. 



■ F.G.S. (PlateXXI.) {Concluded.) 



Studies on the EchinoideaHolecty- 

 poida. By Herbert L. Hawkins, 

 M.Sc, F.G.S. (With five Text- 

 figures.) 



Tertiary Dykes of the Clyde Area. 

 By G. W. Tyrrell, A.E.C.Sc, 

 F.G.S., Lecturer in Mineralogy, 

 Glasgow University. (With two 

 Text-figures.) {Conchided.) ... 



On the Skeleton of Diplodocus as 

 set up in the Natural History 

 Museum, by Dr. W. J. Holland. 

 By the Bev. H. N. Hutchinson, 

 M.A., F.G.S. (Plates XXII, 

 XXIII, and nine Text-figures.) . 

 II. Notices of Memoirs. 

 British Association : Conference of 

 Delegates. Address by John 

 Hopkinson, F.L.S., F.G.S., 

 F.Z.S..... 



GOITTENTS %f: 

 ™ «... ^ ,°M 



Page 

 337 



342 

 350 



35 G 

 371 



Memoir^ 



The Tungsten Deposits of Essex- 

 vale. By A. E. V. Zealley, 

 A.B.C.S., South llhodesia Geo- 

 logical Survey 374 



III. Beviews. 

 G.M.Butler: Handbook of Minerals 378 



H. F. Wickham : Fossil Beetles, 

 Florissant, Colorado 379 



The Zoological Becord 380 



T. Sheppard, M.Sc, F.G.S. : ■ 

 William Smith, his Maps and 

 Memoirs 380 



IV. Beports and Proceedings. 



Geological Society of London — 



June 20, 1917 380 



British Association for the Advance- 

 ment of Science — 

 July 6, 1917 384 



LONDON: DULAU & CO., Ltd., 37 SOHO SQUAEE, W. 1. 



j ^T The Volume for 1916 of the GEOLOGICAL MAGAZINE is ready, 

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



