POULTRY DISEASES AND THEIR TREATMENT 



Undeveloped ovules in ovary. 



Partly developed ovule show- 

 stigma. Here the follicle wall 

 breaks and allows the ovule 

 yolk to leave the ovary pre- 

 paratory to laying. 



An empty follicle in which the 

 stigma and the yolk passed 

 out. 



Opening of oviduct. 



Portion of oviduct distended, 

 allowing yolk to pass down. 



Walls of oviduct which secrete 

 albumen forming the white of 

 the egg. 



Membranous lining added. 



Portion of oviduct that secretes 

 shell-forming substance. 



Cloaca. 



FIG. 18. ORGANS OF REPRODUCTION 

 OF THE HEN 



(From Salmon.) 



