f 



PROCEEDINGS 



OF THE 



ROYAL SOCIETY OF LONDON 



Series B 



CONTAINING PAPERS OF A BIOLOGICAL CHARACTER 



VOL. XCIII. 



LONDON: 



Printed for THE ROYAL SOCIETY and Sold by 

 HARRISON AND SONS, LTD., ST. MARTIN'S LANE, 

 printers in ordinary to his majesty. 



July, 1922. 



