THE 



GEOLOGICAL MAGAZINE 



OR, 



Slotttltlg Joupal of (S«0lojg|) : 



WITH WHICH IS INCORPORATED 



"THE aEOLOG-IST." 



NOS. CCCCXXVII TO CCCCXXXVIII. 



EDITED BY 



HENRY WOODWARD, LL.D., F.R.S., F.G.S., F.Z.S., F.R.M.S., 



OF THE BRITISH MUSEUM OF NATURAL HISTORY; 



PRESIDENT OF THE PAIuEONTOGRAPHICAL SOCIETY, 



VICE-PRESIDENT OF THE ZOOLOGICAL AND MALACOLOGICAL SOCIETIES ; 



MEMBER OF THE LYCEUM OF NATURAL HISTORY, NEW YORK ; AND OF THE AMERICAN PHILOSOPHICAL 



SOCIETY, PHILADELPHIA; HONORARY MEMBER OF THE YORKSHIRE PHILOSOPHICAL SOCIETY; 



OF THE SEOLOOISTS' ASSOCIATION, LONDON; OF THE INSTITUTION OF MINING AND 



METALLURGY, LONDON; OF THE GEOLOGICAL SOCIETIES OF EDINBURGH, 



GLASGOW, HALIFAX, LIVERPOOL, AND SOUTH AFRICA; CORRESPONDING 



MEMBER OP THE GEOLOGICAL SOCIETY OF BELGIUM; OF THE 



IMPERIAL SOCIETY OF NATURAL HISTORY OF MOSCOW ; OF 



THE NATURAL HISTORY SOCIETY OF MONTREAL; 



AND OF THE MALACOLOGICAL 



SOCIETY OF BELGIUM. 



ASSISTED BY 



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



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



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



AND 



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



ISTEAV SERIES. DEC.A.DE IV. VOL. VII. 



JANUARY— DECEMBER, 1900. 



LONDON: / ^ / ^ 



MESSRS. DULAU & CO., 37, SO^O SQUARE 



1900. \ 





