No. 600. 



Decade VI.— Vol. I.— No. VI. 



Price 2s. net. 



THK 



GEOLOGICAL MAGAZINE 



onthlij Journal of ^eologn. 



■WITH WHICH IS INCORPORATKIl 



THE! G-EOLOG-IST. 



EDITED KY 



HENRY WOODWARD, LL.D., F.R.S., F.G.S., &.c. 



A88I8TK1) BV 



Propkssor. J. W. GREGORY, D.Sc, K.R.S., F.G.S. 

 Dr. GKORGIC J. HINDK. F.K.S.. F.G.S. 

 Sir THOM.^S II. HOLLAND, K.C.I. K., A.R.C.i:., D.Sc, F.U.S., F.G.S. 

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

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

 Professor W. W. WATTS, Sc.D., M.Sc, F.R.S., Vick-Prks. Gkol. See. 

 Dr. ARTHUR SMITH WOODWARD, F.R.S., F.L.S., Prks. GKor,. Soc. 



JUNE, 1914. 



O O nSTTEl 3^T 



I. Original Articles. Page 

 The Completion of Fifty Years of 



the Geological Magazine ... 241 

 On some Inclusions in the Great 



Whin Sill of Northumberland. 



By Dr. J. A. Smythe, D.Sc. 



(Plate XVII and Text-figure.) ... 244 

 The Foraminifera of the Speeton 



Clay, Yorkshire. By Dr. E. L. 



Sherlock, A.K.C.Sc, F.G.S. 



(Plate XVIII.) 2.55 



Some new Rock-building Organisms 



from the Lower Carboniferous, 



Westmorland. By Professor E. J. 



Garwood, M.A., F.R.S., F.G.S. 



(Plates XX and XXI.) 265 



Gypsum and Anhydrite in Genetic 



Relationship. By Professor 



Robert C. Wallace, M.A., 



Ph.D., D.Sc, F.G.S 271 



II. Reviews. Page 



Memoirs of Geological Survey of 



Scotland : Ross-shire 



Geology of Fareham and Havant... 

 Tertiary Echinoids of Colorado 



Desert Region 



The D'Urban Artesian Boring, 



British Guiana 282 



276 



278 



281 



III. Reports and Proceedings. 



Geological Society of London — 



April 8, 1914 



April 29 



IV. Correspondence. 

 Professor J. W. Gregory 



V. Obituary. 



Professor Eduard Suess 



283 

 285 



287 



288 



LONDON : DULAU & CO., Ltd. 



SO HO SaUAKE, W 



fi^ The Volume for 1913 of the GEOLOGICAL MAGAZINE is ready, 

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



