-No. 592. 



Decade V.— Vol. X.— No. X. 



Price 2s. net. 



THE 



GEOLOGICAL MAGAZLNE 



OK 



^loiitliiji Joxirnal of ©eologj). 



* WITH WHICH IS INCOKI-OKATKl) 



THE! <3-E]OLOC3-IST. 



EDITKI) BY 



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



ASSISTKl) BV 



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



Dr. GEORGK J. HINDK. F.R.S., F.G.S. 



Sir 'I'HOMAS H. HOLLAND, K.C.I. E., .\.R.C.<., D.Sc, F.R.S., F.G.S. 



Profkssor W. W. WATTS. Sc.D., M.Sc, F.ll.S., Vice-Prks. Geol. Soc. 



Dr. AllTIKIR S.MITH WOODWARD, F.K,.S., F.L.S., Sec. Gkot.. Soc. 



HOIIACK B. WOODWARD. F.ll.S., F.G.S. - 



OCTOBER, 1913. 



OOnSTTEmSTTS. 



I. Oeiginal Articles. Page 



Note on the Piltdown Man 

 [Eoanthropus Dawsoni) . By 

 A. Smith Woodward, LL.D., 

 F.E.S., Keeper of Geology, 

 BritishMuseum (Natural History) . 

 (Plate XV.) 433 



"The Origin of Mountains": a 

 Eeply. ByEev. OsbiondFishee, 

 M.A., F.G.S 434 



New Chalk Polyzoa. By E. M. 

 Brydone, F.G.S. (Plate XIV.) 

 [Continued.) 436 



The Younger Formations of New 

 Zealand. By Professor James 

 Pabk, F.G.S., Otago University, 

 Dunedin, N.Z 438 



On the Important Part played by 

 Calcareous Algse at certain Geo- 

 logical Horizons, with Special 

 Eeference to the Palaeozoic Eocks. 

 By Professor E. J. Garwood, 

 M.A., V.P.G.S. • 440 



A Model for a Polarizing Microscope . 

 By W. N. Benson, B.A., B.Sc, 

 Emmanuel College, Cambridge 447 



II. Notices of Memoirs. ' 

 British Association : Titles of 

 Papers on Geology read in 

 Section C and elsewhere 448 



Notices of Memoirs {cont.). Page 

 British Association : Abstracts of 

 Papers read in the Geological 

 Section ... 452. 



III. Eeviews. 

 Summary of Progress of the Geo- 

 logical Survey of Great Britain 466 

 J. Postlethwaite's Mines and 



Mining 468 



The Calvert Boring . . 469 



Diffusion in relation to Agate 



Structure 469 



Determinative Mineralogy Tables... 470 

 United States Geological Survey . . . 470 

 Geology of Western Australia . . . 473 

 Annals of the Belgian Congo 



Museum r 473 



Geology of Northern Assam 474 



Brief Notices 475 



IV. Correspondence. 



A.E.Hunt 



A. J. Jukes-Browne 



Dr. J. W. Evans 



V. Obituary. 



Sir George H. Darwin, K.C.B. 

 Dr. Tempest Anderson, F.G.S. 

 William Henry Sutcliffe, F.G.S. 



475 

 475 



477 



477 

 478 

 479 



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