PRICE, WITH SUPPLEMENT, ONE SHILLING 



VOL. IV. MAY, 1861. No. 41. 



THE GEOLOGIST; 



AN ILLUSTEATED 

 POPULAR MONTHLY MAGAZINE 



OP 



GEOLOGY. 



EDITED BY S. J. MACKIE, F.G.S., E.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."— Herschell : 

 Discourse on BtudlAj of Natural Philosophy. 



LONDON: 



PUBLISHED AT THE OFFICE OF THE GEOLOGIST, 

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



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



MONTREAL. 



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

 C. BAILLY BAILLIERE, OALLE DEL PRINCIPE, MADRID. 



PRINTED AT THE GEOLOGIST OFFICE, 22, SOUTHAMPTON-STREET, STRAND, LONDON. 



