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FRIDAY, August gm, lo a.m. 

 SECTION I.— EVOLUTION, BIONOMICS, AND MIMICRY. 



President : V. Kellogg. 

 Vice-Pyesident : A. Grouvelle. 

 Secretary : H.H. Druce. 



R. C. PuNNETT, on behalf of Mr. J. CF. Fryer, communi- 

 cated a paper on : 



The Polymorphism of Papilio polytes. 

 (No manuscript received. — Editors.) 



After reading tlie paper Prof. Pun nett said that the propor- 

 tion of the several forms of female suggested a population in 

 equilibrium. This he regarded as pointing to there being an 

 absence of discriminating selection going on amongst the three 

 forms of female of Papilio polytes. 



J. C. H. DE Meijere stated that he had occupied himself with 

 studying the experiments of Mr. Jacobson on Papilio mernnon. 

 There was an agreement in so far as there also the non-mimetic 

 form was the only one which would produce that form exclusively. 

 He congratulated Mr. Fryer and Prof. Punnett on the results 

 obtained. On the other hand, in P. niemnon there seemed not 

 to occur simple sex-limited inheritance, because in that species 

 none of the female forms were quite like the male. 



C. Annandale congratulated Mr. Fryer on attacking so 

 important a problem in the tropics, and not on a hurried expedi- 

 tion. He also pointed out the possible importance of environ- 

 ment on the suppression of the ova at a comparatively early stage, 

 and also the possibility that ova with certain fundamental 

 characters were more easily suppressed than others. 



Hon. W. Rothschild said that the question of ñsh fertility 

 in relation to food, as raised by Dr. Annandale, was vitiated 

 bv the experience of the naturalists of Bonn, between the years 



