C ASSELL'S 



NATURAL HISTORY 



EDITED BY 



P. MARTIN DUNCAN, M.B. (LOND.), F.R.S., F.G.S. 



PROFE880K OF GEOLOGY IN AND HONORARY FELLOW OF KING'S COLLEGE, LONDON ; 

 CORRESPONDENT OF THE ACADEMY OF NATURAL SCIENCES, PHILADELPHIA 



VOL. VI. 



ILL US T It A TED 



CASSELL AND COMPANY, LIMITED 



LONDON, P All IS & MELBOURNE 



1896 



ALL KIOBTS RE8F.RVKIJ 



