82 



EARLY EMBRYOLOGY OF THE CHICK 



embryo 



lateral amniotic fold 

 lateral body fold 



ex-embryonic 

 coelom 



pleure 



mes ) , , 

 ent f splai^ch" 

 nopleurc 



yolk 



amniotic cavity 



lateral 

 amniotic fold 



^ somatopleure\ 



serosa 

 somatopleure) 



embryo 



allantois / splanchnopleure ) 

 yolk stalk 



yolk-sac 

 /splanch- 

 nopleure \ 



albumen 



vitelline membrane 



Fig. 30. 



