PRICE, WITH SUPPLEMENT, ONE SHILLING- AND SIXPENCE. 



VOL. IV. OCTOBER, 1861. No. 46. 



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 objects of which it treats, 

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

 Discowse on SiM<kj of Natural Philosophy. 



LONDON: 



PUBLISHED AT THE OFFICE OF THE GEOLOGIST, 

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



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



MONTREAL. 



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

 ' C. BAILLY BAILLIERE, OALLE DEL PRINCIPE, MADRID. 



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



