6 



arm of the sea. Mr. H. J. Turner referred to the tendency of the 

 species to develope deformities when inbred in confinement for 

 several generations ; and Mr. F. W. Frohawk considered that the 

 wild British fen insects differed from others in the shape of their 

 wings. Messrs Sich, Curwen and others also took part in the 

 discussion. 



