PROCEEDINGS 



OF THE 



ROYAL SOCIETY OF LONDON 



Series B 



CONTAINING PAPERS OF A BIOLOGICAL CHARACTER 



LONDON: 



Printed for THE ROYAL SOCIETY and Sold by 

 HARRISON AND SONS, ST. MARTIN'S LANE, 

 printebs in ordinary to his majesty. 



November, 1909, 



VOL. LXXXI. 



