GENITAL ORGANS OF THE SOW 611 
fibers between two layers of longitudinal fibers. The mucous membrane is plicated, 
and is intimately united with the muscular coat. 
The vulva is about three inches (7.5 cm.) in length. The labia are thick and 
are covered with a wrinkled integument. The dorsal commissure is rounded, but 
the ventral one is produced to form a long pointed projection. The fossa clitoridis 
is nearly an inch (ca. 2 em.) anterior to the ventral commissure. Above it the 
glans clitoridis forms a pointed projection, from which a mucous fold extends 
laterally and backward on each side. There is a deep central depression about 
half way between the fossa clitoridis and the external urethral orifice. The latter 
is bounded on each side by a thick fold which extends backward for a variable 
I 
Fic. 540.—Genitat Orcans or Sow; Dorsat View. Tue Vutva, Vactna, AND Cervix UTerI ARE Stir OPEN. 
1, Labium vulve; 2, glans clitoridis; 3, vulva; 4, external urethral orifice; 5, vagina; 4’, cervix uteri; 6, corpus 
uteri; 7, cornua uteri, one of which is opened at 7’ to show folds of mucous membrane; 8, uterine tube; 8’, abdominal 
opening of tube; 9,9, ovaries; 10, ovarian bursa; 11, 11, broad ligaments of uterus; 72, urinary bladder. (From 
Leisering's Atlas.) 
distance. Lateral to this fold is a depression in which the ducts of vestibular glands 
open. 
On either side of the anterior part of the floor of the vulva there is a cul-de-sac and a deep 
groove leading back from it; these are bounded medially by a longitudinal fold. Ductus epo- 
ophori (canals of Gartner) may be found opening anterior to the external urethral orifice. 
The clitoris is long and flexuous; its glans forms a pointed projection over the 
fossa clitoridis. 
The urethra is about three inches (ca. 7-8 em.) long. Its posterior part is fused 
with the vagina and produces a corresponding elevation of the floor of the latter. 
The mammary glands are usually ten or twelve in number, and are arranged 
in two rows, as in the bitch. Each teat has commonly two ducts. 
