PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 86. No. B 584. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



The Chemical Action of Bacillus cloacae (Jordan) on Citric and Malic Acids 

 in the Presence and Absence of Oxygen. By JAMES THOMPSON 



Page 



The Origin and Destiny of Cholesterol in the Animal Organism. Part X. — - 

 On the Excretion of Cholesterol by Man, when fed on Various Diets. 

 By G. W. ELLIS and J. A. GARDNER 13 



Some Experiments with Arsenphenylglycin and Trypanosoma gambiense in 



Glossina palpalis. By H. L. DUKE 19 



On a Gregarine — Steinina rotundata, nov. sp. — present in the Mid-Gut of 

 Bird-Fleas of the Genus Ceratophyllus. By J. H. ASHWORTH, D.Sc, 

 and THEODORE RETTIE, D.Sc, Zoological Department, University of 

 Edinburgh. (Plate 1) 3* 



The Size of the Aorta in Warm-Blooded Animals, and its Relationship to 

 the Body Weight and to the Surface Area Expressed in a Formula. By 

 GEORGES DREYER, WILLIAM RAY, and E. W. AINLEY WALKER . 39 



The Size of the Trachea in Warm-Blooded Animals, and its Relationship to 

 the Weight, the Surface Area, the Blood Volume, and the Size of the 

 Aorta. By GEORGES DREYER, WILLIAM RAY, and E. W. AINLEY 

 WALKER 5& 



Notes on the Life-History of Trypanosoma gambiense, etc. By MURIEL 

 ROBERTSON. (Abstract) 



PRINTED FOR THE ROYAL SOCIETY AND SOLD BY 

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

 Price Three Shillings. 



No. B 584. 



December 17, 1912. 



