ARBOREAL LIFE 



AND THE 



EVOLUTION OF THE HUMAN EYE 



A REVISED PUBLICATION OF THE 

 BOWMAN LECTURE 



DELIVERED BEFORE THE OPHTHALMOLOGICAL SOCIETY OF THE 

 UNITED KINGDOM IN MAY, 1921 



BY 



E. TREACHER COLLINS, F.R.C.S. 



CONSULTING SURGEON, ROYAL LONDON OPHTHALMIC HOSPITAL (MOORFIELDs) ; 

 CONSULTING OPHTHALMIC SURGEON, CHARING CROSS HOSPITAL 



WITH COLORED FRONTISPIECE AND 25 ILLUSTRATIONS 



IN THE TEXT 



LEA & FEBIGER 



PHILADELPHIA AND NEW YORK 



1922 



