PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 88. No. B 604. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



Observations on the Life-Cycle of a New Flagellate, Helkesimastix faecicola, 

 n.g., n.sp. : Together with Remarks on the Question of Syngamy in 

 the Trypanosomes. By H. M. WOODCOCK, D.Sc, Assistant to the 

 Professor of Protozoology, University of London, and G. LAPAGE, M.Sc, 

 Assistant Lecturer and Demonstrator in Zoology, Victoria University, 

 Manchester. (Plates 1 3 and 14) 353 



The Antagonistic Action of Carbon Dioxide and Adrenalin on the Heart. 



By S. W. PATTERSON, M.D., Beit Memorial Research Fellow . 37* 



Obituary Notice of Fellow Deceased : — Arthur Lister .... i — xi 



printed for THE ROYAL SOCIETY and sold by 



HARRISON & SONS, 45, ST. MARTIN'S LANE, LONDON, W.C. 

 Price Two Shillings and Sixpence. 



No. B 604. 



February 1, 1915. 



