PRICE, WITH SUPPLEMENT, ONE SHILLING AND SIXPENCE. 



VOL. IV. DECEMBER, 1S61, No. 4S 



THE GEOLOGIST; 



AN ILLUSTRATED 

 POPULAR MONTHLY MAGAZINE 



OF 



GEOLOGY. 



EDITED BY S. J. MACKIE, F.G.S., F.S.A. 



" Geology, in the magnitude and sublimity of the objeots of which it treats, 

 undoubtedly ranks in the scale of the sciences next to Astronomy." — Ilerschel : 

 Discourse on Study of Natural Philosophy. 



LONDON: 



PUBLISHED AT THE OFFICE OF THE GEOLOGIST, 

 25, GOLDEN-SQUARE, REGENT-STREET, W. 



BAILLIERE, BROTHERS, 400, BROADWAY, NEW YORK j B. DAWSON & SONS, 



MONTREAL. 



MESSRS. J. B. BAILLIERE ET FILS, RUE HAUTEFEULLLE, PARIS. 

 C. BAILLY BAILLIERE, CALLE DEL PRINCIPE, MADRID, 



PRINTED AT THE GEOLOGIST OFFICE, GOLDEN-SQUARE, LONDON. 



