Fig. 8. 13th day: 1- nostrils; 2- beak node; 3- parts of the 

 upper jaw; 4- lower jaw; 5- trachea; 



Fig. 9. 16th day; cartilaginous capsule of the beak from the 

 side: 1- beak node; 2- nostrils; 3- upper capsule; 



Fig. 10. 19th day: 1 and 3- as in Fig. 9; 2- lower part of 

 the lower jaw; 



Fig. 11. domestic goose, 8th day of incubation: 1- amnion 

 with corrugations, caused by the effect of water; 2- chorion; 

 3- place of union of proper membrane of yolk with chorion and 

 amnion; 4- cut membrane of yolk; 5- opening of amnion, or 

 navel; 6- small intestine; 7- yolk duct; 8- vascular zone; 

 9- its lateral parts; 10- left leg; 11- rudiments of fingers; 

 12- uropiges; 13- tail; 14- heart; 15- forehead; 16- brain 

 with vessels; 17- eye; 



Figs. 12-15. 8th, 10th, 11th and 12th day: 1- fingers; 



2- membrane; 



Fig. 16. 1- swimming membrane; 2- claws; 



Fig. 17. 17th day: 1- claws; 2- elongated scales; 3- wart- 

 shaped scales; 



Fig, 18. 21st day: 1- claws; 2- elongated scales; 3- remnants 

 of swimming membrane; 4- wart-shaped scales; 



Fig. 19. sixth hour of the 4th day: 1- chorion; 2- amnion; 



3- vascular zone; 4- yolk membrane; 5- intestines; 6- navel; 

 7- tail; 8- leg; 9- wing; 10- aorta; 11- heart; 12- lower 

 jaw; 13- forehead; 14- brain; 15- eye; 



Fig. 20. 6th day: 1- oesophagus; 2- craw; 3- stomach; 



4- duodenum; 5- pancreas; 6- small intestines; 7- yolk- 

 intestinal duct; 8- rudiment of caecum; 2- rectum; 10- cloaca; 

 11- vascular zone; 



Fig. 21. 9th day: 1- oesophagus; 2- craw; 3- tendinous part 

 of the stomach; 4- muscular part of the stomach; 5- duodenum; 

 6- pancreas; 7- small intestines; 8- yolk duct; 9- vascular 

 zone; 10- yellow vessels; 11- rectum; 12- cloaca; 13- anal 

 opening; 14- large intestines; 15- caecum; 



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