Professor Meldola, in proposing a vote of thanks to 
Mr. Merrifield, Dr. Dixey, and Mr. Frohawk, said that he 
was glad to think that the subject of Seasonal Dimorphism, 
which had been first investigated systematically by Weis- 
mann, was receiving so much attention in this country. He 
was of opinion that the results hitherto arrived at were quite 
in harmony with Weismann’s theory of reversion to the 
glacial form and all the evidence recently accumulated by 
the excellent observations of Mr. Merrifield and others went 
to confirm this view as opposed to that of the direct action 
of temperature as a modifying influence. 
Mr. Merrifield, Mr. Barrett, and Dr. Dixey took part in 
the further discussion which ensued. 
