CASSELL'S 



NATURAL HISTORY 



EDITED BY 



P. MARTIN DUNCAN M.B. (LOND.) F.R.S. F.G.8. 



PROFESSOR OF OEOLOOY IN AND HONORARY FELLOW OF KINO's COLLEGE LONDON 

 CORRESPONDENT OF THE ACADEMY OF NATURAL SCIENCES PHILADELPHIA 



VOL. III. 



ILLUSTRATED 



CASSELL AND COMPANY LIMITED 



LONDON PARIS & MELBOURNE 



1893 



ALL RIGHTS RESKIiVi< 



