No. 544. 



Decade V.— Vol. VI.— No. X. 



Price Is. 6d. net. 



THE 



GEOLOGICAL MAGAZINE 



JKontlilji Journal i}f deologji. 



WITH WHICH IS INCORPORATKU 



THE G-EOLOC3-IST. 



EDITED KY 



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



ASSISTED BV 



Profkssor W. W. watts, Sc.D., M.Sc, F.R.S., V.P.G.S. 

 Dr. GEORGK J. HINDK, F.K.S.. &c., and IIOKACI'; B. WOODWARD, F.R.S., &c. 



OCTOBER, 1909. 



con^TEnsTTS 



I. Ohioixal Articlks. l^cge 



The Mechnnism of Volcanic Action. 

 By H. J. Johnston-Lavis, M.D., 

 F.G.S., Professor of Vulcanology 

 in the University of Naples. (Plates 

 XXIV and XXV, and Text-plate.) 433 



Two Cephalopods from the Tyrol. By 

 G. C. Crick, A.R.S.M., F.G.S. 

 (Plate XXVI.) 434 



-SjoirorJis-Limestoues in the 'Permian '. 

 By T. C. Cantrill, B.Sc.Lond., 

 F.G.S. 447 



The Old Granites of Africa. By 

 C. B. HoRwooD, F.G.S., and A. 

 Wade, F.G.S 455 



The Culm of "Western Germany. By 

 Dr.W. Hind, B.Sc.Lond., F.G.S., 

 etc., etc 468 



LONDON : DULAU & CO., 



II. Notices of Memoirs. Tage 



List of Papers read at the British 

 Association, Winnipeg 473 



The Glacial Lake Agassiz. By Warren 

 Upham, A.M., D.Sc 475 



III. Reviews. 

 An Egyptian Oasis. By H. J. 



Llewellyn Beadnell 476 



The Geological Survey of New Zealand, 



ByP. G.Morgan 



Brief Notices 



IV. Correspondence. 



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



V. Obituary. 

 William Ford Stanley ^^.t'-TT ... m 



VI. MiscEi/C^isiJpiSonian Instif^ 



Victoria University, Mi<^^ester ... 480 



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5QIURE, W 

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