29 



Harold W . Leigh-Sharp, B.Sc. Lond. 



The Comparative Morphology of the Secondary Sexual 

 Characters of Elasmobranch Fishes. The Olaspers, Clasper 

 Siphons, and Clasper Glands. 



The Publication Committee desire to call the attention of 

 those who propose to ofier Papers to the Societ}^ to the great 

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

 necessary for the present that papers should be condensed, and 

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



• Communications intended for the Scientific Meetings should 

 be addressed to 



P. CHALMERS MITCHELL, 



Secretary. 



Zoological Society of London, 



Eegent's Park, London, N.W. 8. 

 October 22th, 1918. 



