634. 



Decade VI.— Vol. IV.— No. IV. 



Price 2s. net. 



THE 



GEOLOGICAL MAGAZINE 



iftonthli) Journal of ©eoloau. 



WITH WHICH IS INCORPORATED 



THE G-EOLOG- 



EDITED BY 



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



ASSISTED BY 



Professor J. W. GREGORY, D.Sc, F.R.S., F.G.S. 

 DR. GEORGE J. HINDE, P.R.S., F.G.S. 

 SIR THOMAS H. HOLLAND. K.C.I.E., A.R.O.S., D.Sc. F.R.S.. VlCE-PRES. G. 

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

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

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

 DR. ABTHUR SMITH WOODWARD, F.R.S., F.L.S., VlCE-PRES. Geoi,. Soc. 



APRIL, 1917. 



OOISTTEITTS 



I. Original Articles. Page 



New Chalk Polyzoa. By E. M. 

 Brydone, F.G.S. (Plate IX.)... 145 



The Integument of Iguanodont 

 Dinosaurs. By R. W. Hooley, 

 (PlateX.) 148 



Picrite from Mozambique. By 

 Arthur Holmes and H. P. 

 Haewood. (Plate XL) 1-50 



Disturbed Gravels. By R. M. 

 Deeley, M.Inst.C.E. (With 

 a Text-figure.) 157 



Morphology of the Eehinoidea 

 Holectypoida, etc. By Heebert 

 L. Hawkins, F.G.S 160 



The Genotypes of some Polvzoan 

 Genera. By W. D. Lang, 

 M.A., F.G.S 169 



II. Reviews. Page 



Post-Glacial Uplifts in Norway. 



By L. Hawkes 174 



Geology of Chitral, Gilgit, and the 



Pamirs. By H. H. Hayden, 



CLE., F.R.S 175 



Platiniferous Deposits of Spain and 



Russia 176 



Geology of the Urals 178 



Lower Devonian Fauna, U. States. 179 

 Progress of the British Geological 



Survey 180 



Prof. H. Ries' Economic Geology... 181 

 Zinc and Lead Deposits, U. States 181 

 Mineral Production of Canada 182 



III. Repoets and Peoceedings. 

 Geological Society of London — 



February 7, 1917 182 



Annual General Meeting, Feb. 16 185 



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



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

 price 26s. n et. Cloth Cases for Binding may he had, price ls^ 6d. net. 



