No. 394. New Series.— Decade IV.— Vol. IV.— No. IV. Price Is. 6d. nett. 



THE 



GEOLOGICAL MAGAZINE: 



onthig JauiiiiHl of (SdoIojj. 



WITH WHICH IS INCORPORATKD 



"TtlE OEOLOG^IST." 



EDITED BY 



HENRY WOODWARD, LL.D., F.R.S., V.P.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., <fcc., and 



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



APRIL, 1897. 



OOIsTTiBn^TS. 



I. Okiginal Articles. page 



1. A New Specimen of Stereosternnm 

 tumiduiii from BraziL By A. S. 

 WooDWAUD, F.L.S., F.G.S. 

 (With Plate V.) 145 



2. Acanthonautilus bispinostis, from 

 the Carboniferous of Ireland. 

 ByA.H. FooRD, Ph.D., F.G.S. 

 (With Plate VI.) 147 



3. Notes on Eocks from the Tonga 

 Islands. By J. J. H. Teall, 

 F.R.S., and E. T. Newton, 

 F.K.S 151 



4. On the Erratic Boulders in the 

 Drift of Eastern England. By 

 Sir H. H. HowoRTH, K.C.I.E., 

 M.P., F.RS., F.G.S. (Con- 

 cluded from p. 130.) 153 



5. On the Subdivisions of the 

 Carboniferous Series in Great 

 Britain. By Wheelton Hind, 

 M.D., B.Sc.Lond., F.R.C.S., 

 F.G.S 



6. Foreign Boulders in the Chalk 

 ByE. A. Martin, F.G.S 



159 



169 



II. Eeviews. page 



1. study of Madreporarian Types 

 of Corals. By Miss Maria 

 Ogilvie, D.Sc 170 



2. On the Gases enclosed in 

 Crystalline Eocks and Minerals. 

 ByW.A. Tilden, D.Sc.,F.E.S. 177 



3. Chemical Geology. By Henri 

 Moissan 178 



4. Geology of Africa. By Walcot 

 Gibson, F.G.S. 179 



III. Eeports and Proceedings. 

 Geological Society of London — 



1. Annual General Meeting, Feb. 



19, 1897 180 



2. Ordinary Meeting, March 10, 

 1897 188 



IV. Coruespondence. 



1. Mr. Dugald Bell, F.G.S 



2. Mr. A. C. Seward, M.A., F.G.S 



3. Dr. J. W. Gregory, F.G.S. .., 



V. Obituary. 



1 . Prof. Charles Tomlinson, F.E.S 



2. Eev. J. E. Cross, M.A., F.G.S 



VI. Miscellaneous. 



New Geological Survey Maps .. . 192 



190 

 190 

 191 



191 

 192 



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