No. 459. New Series.— Decade IV.— Vol. IX.— No. IX. Price Is. 6d. nett. 



THE 



GEOLOGICAL MAGAZINE 



OR, 



onthig Jauiiital of (S^olosj, 



WITH WHICH IS INCORPORATHD 



"THE aEOLOG^IST." 



EDITED KY 



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. , KL.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. 



SEPTEMBER, 1902. 



~L. Original Articles. page 



1. The Giant Beaver {Trogon- 

 theriuiii) from tlie Thames 

 Valley. By E. T. Newton, 

 F.E.S., F.G.S. (With AVood- 

 cut.) 385 



2. On the Genus Periprhtis. By 

 Dr. C. R. Eastman. (With 

 Illustrations.) 388 



3. The Wood's Point Dyke, Vic- 

 toria, Australia. By F. P. 

 Mennell, F.G.S. (WithlUus- 

 trations.) 392 



4. The Past and Present of a bit of 

 Dartmoor. By.H. J. Lowe, 

 F.G.S. (With 2 Sketch-maps.) 397 



■^ b. Cambrian Ostracoda from N.E. 

 America. By Prof. T. Eupert 

 Jones, F.R.S., F.G.S. (With 

 lUustratious.) 401 



6. Note on the Upper Chalk of 

 Lincolnshire. By William 

 Hill, F.G.S 404 



7. On Marine and Subaerial ^^^j^.— . ^,^— -=>^ 



Erosion. By H. W. MoNCKTONv;J?^ifl'''J>liimf •J>/";fi^rd, F.G.S. (With 

 F.L.S., F.G.S. (WithanI^u^<^^ ' -^„-.-%"!^ ;. . ^ L'",^.'^ 



tratiou.) ,^. 4^6; 



LONDON: DULAT]\&i'^., 37, SOa# SQUARE, 



Original Articles — continued. page 

 8. Life of Dr. Ferdinand von 

 Roemer. By F. W. Simonds. 

 (With Portrait, Plate XIX.) ... 412 



II. Notices of Memoirs, etc. 

 Nine short notices 417 



III. Reviews. 



Geological Studies on the Isthmus 

 of Panama. By MM. Bei-trand 

 and Zuixher 419 



IV. Reports and Proceedings. 

 Geological Society of London — 



June 18th, 1902 425 



V. Correspondence. 



1. Thos. Sheppard, F.G.S 427 



2. PhiKp Lake, M.A., F.G.S 428 



3. A. R. Hunt, M.A., F.G.S. ... 428 



4. John E. Marr, M.A., F.R.S.. ..-430 



a page-i8asftation of Ruffordia 

 ^epperti-^lSaward.) .) '. 430 



^ The Volume for 1901 of the GEOLOGICAL MAGAZINE is ready, 

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



