fo. 407. New Series.— Decade IV.— Vol. V.— No. V. Price Is. 6d. nett. 



THE 



GEOLOGICAL MAGAZINE 



OR, 



JHonthli) Jauiinal af {Ifolojg, 



WITH WHICH IS INCORPORATKD 



**TH.E GJ^EOLOGS^IST." 



EDITED BY 



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



ASSISTED BY 



ROBERT ETHERIDGE, F.R.S., L. & E., F.G.S., &c., 

 WILFRID H. HUDLESTON, M.A., F.R.S., F.L.S., F.G.S,, &c., 

 GEORGE J. HINDE, Ph.D., F.R.S., F.G.S. , &c., AND 

 HORACE B0LING3R0KE WOODWARD 



MAY, 1898. 



OO n^TZBHSTTS, 



I. Original Articles. p 



1. Professor J. W. Spencer on 

 Clianges of Level in Mexico. 

 By Professor E. Hull, M.A., 

 LL.D., F.R.S., F.a.S 



2. Tlie Surface G-3oIogy of the 

 JSTortli of Europe. By Sir 

 Henry Howorth, K.C.I.E., 

 M.P., F.R.S., F.G.S. (Plate 

 VII.) 



3. Notes on the Affinities of the 

 Genera of the Cheiruridae. By 

 F. R. CowPER Reed, M.A., 

 F.G.S 



4 . A Revindication of the Llanberis 

 Unconformity. By the Rev. 

 J. F. Blake, M.A., F.G.S. 

 With 7 Illustrations. (Con- 

 cluded from p. 178.) 2U 



II. Notices of Memoirs. 



1. Artificial Production of Diamond 

 in Silicates. By Herr von I. 

 Friedlander 226 



2. Diatomaceous Earth Deposits of 

 New South Wales. Bv G. W. 

 Card, F.G.S., and W. S. Dun . 227 



193 



195 



206 



III. Reviews. page 



1. Fossil Plants. By A. C. Seward, 

 M.A., F.G.S 228 



2. A New Geological Map of 

 England and Wales. By Sir 

 A. Geikie, D.C.L., LL.D., 

 F.R S 232 



IV. Reports and Proceedings. 



Geological Society of Lonion — 



1. March 9, 1898 233 



2. March 23, 1898 235 



3. April 6, 1898 237 



V. Coruespondence. 



1. Professor M. E. Wadsworth ... 239 



2. F. R. Cowper Reed, M.A., 



F.G.S. 



240 



VI. Miscellaneous. 



1. New Geological Survey Maps... 240 



2. Geological Survey 240 



3. A Liner in a Duststorm 240 



LONDOIs^: DULAU & CO., 37, SOHO SaUARE. 



(^ The Volume for 1897 of the GEOLOGICAL MAGAZINE is now ready, 

 price 20s, nett. Cloth Cases for Binding may be had, price Is. 6d. nett. 



