33 



Lt.-Col. S. MONCKTON COPEMAN, F.R.S., F.Z.S. 



Experiments on Sex Determination. 



Chas. F. Sokntag, M.D., Ch.B., F.Z.S. 



The Variations in the Digastric Muscle of the Rhesus 

 Macaque and the Common Macaque. 



E. S. Russell, M.A., B.Sc, F.Z.S. 



ISTote on the Righting Reaction in Asterinci gibhosa Penn. 



The Publication Committee desire to call the attention of 

 those who propose to offer Papers to the Society, to the great 

 increase in the cost of paper and printing. This will render it 

 necessary for the present that papers shovild be condensed and 

 be limited so far as possible to the description of new results. 



Communications intended for the Scientific Meetings should 

 be addressed to 



P. CHALMERS MITCHELL, 



Secreta7'7/. 

 Zoological Society of London, 



Regent's Paek, London, N,W. 8. 

 JVovember 10th, 1919. 



