No. 566. 



Decade V.— Vol. VIII. —No. VIII. 



Price 2s. net. 



THE 



GEOLOGICAL MAGAZINE 



OR 



^Wonthhj Journal of deologj). 



WITH WHICH IS INC0RP0RA1ED 



THIIE G-ZEOLOG-IST. 



EDITED BY 



_<o v 



<£ 



x^soniafi » 



HENRY WOODWARD, LL.D., F.R.S./ F.*ti.S., &c. 



1SSISTK.1) BY 



Professor J. W. GREGORY, D.Sc, F.R.S.Stp!§6/}n a l Wl.UCfctf^' 



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.RJjTTf.G.S. 



Professor \V. W. WATTS, Sc.D., M.Sc, F.R.S., Pres. Geol': Soc. 



Dr. ARTHUR SMITH WOODWARD, F.R.S., F.L.S., Sec.Geol.Soc, and 



HORACE B. WOODWARD, F.R.S., F.G.S. 



AUGUST, 1911. 



OOITTEDNrTS. 



I. Original Articles. Page 



Sedgwick Museum Notes : A New 

 Fossil from Girvan. By F. R. 

 Cowper Reed, M. A., F.G.S. 

 (Plate XV.) 337 



On Dedolomitization. By T. CROOK, 

 A.R.C.S. (Dublin), F.G.S. (With 

 two Text-figures.) '339 



The Granite Mass of Foxdale, Isle 

 of Man . By William C . Simmons , 

 B.Sc, A.R.C.S. (Map, Plate XVI, 

 and two Sections.) 345 



Formation of Laterite from a 

 Quartz-free Diabase. By Pro- 

 fessor J. B. Harrison, C.M.G., - 

 M.A., F.G.S., F.I.C. .... ... ... 353 



What is a Metamorphic Rock ? 

 By Professor E. H. L. SCHWARZ, 

 A.R.C.S., F.G.S., etc 356 



A large Anthrapalcemon from the 

 Middle Coal-measures, Sparth 

 Bottoms, Rochdale. By Henry 

 Woodward, LL.D., F.R.S., 

 F.G.S. (With a Text-figure.) ... 361 



II. Reviews. 

 Mr. E. A. Newell Arber's Coast 

 Scenery of North Devon. 

 (Plate XVII.) .366 



Page 



Barrande's Silurian System of 

 Bohemia. Vol. IV: Gasteropoda. 

 By Dr. J. Perner 369 



Royal Commission on Coast Erosion 

 and Afforestation ' ... 375 



Geology and Agriculture . By A . D . 

 Hall, F.R.S., and E. J. Russell, 

 D.Sc 376 



Brief Notices : Dr. C. D. Walcott's 

 Cambrian Geology and Palaeon- 

 tology — G. P. Merrill's Moldavites 

 — E. J. Russell, Lessons on Soils 378 



III. Reports and Proceedings. 



Geological Society of London — 



June 14, 1911 379 



Linnean Society — June 1 380 



South Stafford and Warwickshire 

 Institute of Mining Engineers . . . 381 



IV. Miscellaneous. 



British Museum (Nat. Hist.), 



German Lacustrine Mollusca ... 384 

 Geological Society's Collections ... 384 

 Mr. Herbert Bolton, F.G.S 384 



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6§jT The Volume for 1910 of the GEOLOGICAL MAGAZINE is ready, 

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