THE EVOLUTION 

 of CONTINUITY in the 

 NATURAL WORLD 



By DAVID RUSSELL, M.D. 



DIRECTOR OF THE BRITISH HOSPITAL, 

 AND DOCTOR TO THE BRITISH LEGATION, LISBON 



LONDON: GEORGE ALLEN & UNWIN LTD. 

 RUSKIN HOUSE, 40 MUSEUM STREET, W.C. 1 



3>c 



