72 



THE BIOLOGY OF TWINS 



Five years after his first paper on polyembryony in 

 D. kyhridiis Fernandez'^ reported further facts about 



Fig. 26 



this species and dwelt especially upon the origin of the 

 individual embryos from the undivided egg. He appears 



^ M. Fernandez, Proc. IX^ Congres. de Zobl. Monaco, 19 14. 



