REPRODUCTION 



8l 



SOhMTOFLEURE 



AMNION CAVITY\ 



EXTRA-EMBRYON, 

 COELOM 



SEROSA ^CHORION 

 I 



AMNION 



.COELOM 



A. 



AMNION CAVITX 

 AMNION, 



ENTERON 

 BRAIN 



SEROSA 



FOETAL PLACEfNfTA 

 ALLANTOIS 



COELOM 

 YOLK-STALK 



YOLK 



SPLANCHNOPLEURE 



Fig. 74. — Diagrams illustrating the development of the amnion and allantois. 

 Upper figure, earlier stage; section transverse to long axis of embryo. Lower figure, 

 later stage; longitudinal section of embryo. (After Kingsley, modified). 



