72 



THE BIOLOGY OF TWINS 



Five years after his first paper on polyembryony in 

 D. hyhridus 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 ZoSl. Monaco, 1914. 



