POULTRY DISEASES AND THEIR TREATMENT 
a. Undeveloped ovules in ovary. 
b. Partly developed ovule show- 
stigma. Here the follicle wall 
breaks and allows the ovule 
yolk to leave the ovary pre- 
Paratory to laying. 
ec, An empty follicle in which the 
stigma and the yolk passed 
out. 
d. Opening of oviduct. 
e. Portion of oviduct distended, 
allowing yolk to pass down. 
f. Walls of oviduct which secrete 
albumen forming the white of 
the egg. 
g. Membranous lining added. 
h. Portion of oviduct that secretes 
shell-forming substance. 
i. Cloaca. 
Fic. 18.—ORGANS OF REPRODUCTIGN 
“OF THE HEN 
(From Salmon.) 
78 
