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Geological magazine: 



WITH WHICH IS INCORPORATKD 



THE G-EOLOGHST." 



NOS. CCCXIX. TO CCCXXX. 



EDITED BY 



HENRY WOODWAED, LL.D., F.R.S., F.G.S., F.Z.S., F.Pt.M.S., 



OF THE BRITISH MUSEUM OF NATURAL HISTORY; 



VICE-PRESIDENT OF THE PALiEONTOGRAPHICAL SOCIETY, 



MEMBEH OF THE LYCEUM OP NATtTEAL HISTOBY, NEW YOEK; AND OP THE AMERICAN PHILOSOPHICAL 



SOCIETY, PHILADKLPHIA ; HONOEAKY MEMBEE OP THE YORKSHIRE PHILOSOPHICAL 



SOCIETY; OP THE GEOLOGISTS' ASSOCIATION, LONDON: OP THE GEOLOGICAL 



SOCIETIES OF EDINBURGH, GLASGOW, HALIFAX, LIVERPOOL, AND NOB- 



WICH; COEEESPONDING MEMBER OP THE GEOLOGICAL SOCIETY 



OF BELGIUM; OF THE IMPERIAL SOCIETY OP NATURAL 



HISTORY OF MOSCOW ; OF THE NATURAL HISTOBY 



SOCIETY OP MONTREAL; AND OF IHB 



MALACOLOGICAL SOCIETY 



OF BELGIUM. 



ASSISTED BY 



EOBEET ETHEEIDGE, E.E.S. L. & E., F.G.S., F.C.S, &c., 



OF THE BRITISH MUSEUM OP NATURAL HISTOBY. 



s. 



WILFEID H. HUDLESTON, M.A., F.E.S., V.P.G.S., F.L.S., F.C S. 



AND 



GEOEGE J. HINDE, Ph.D., F.G.S., &c. 



NEW SERIES. DECIDE III. VOL. "^III. 



JANUAEY— DECEMBER, 1891. * , - --..., 



EEGAN" PAUL, TEENCH, TEUBNEE\& Co., Limited, 



PATERNOSTER HOUSE, CHARINQ CROSS ElS^,*W.C. ^^i'i'^^' 



F. SAYY, 77, BOULEVART ST.-GERMAIN, PAlttS:- " "li':^- '- 

 1891. 



