26 2 VETERINARY OBSTETRICS. 
In the small ruminants there are two mammz and 
two teats, constructed like those of the Cow. 
Fic. 13. 
SECTION OF THE Cow’s TEAT. 
a, a, Principal Lactiferous Ducts; 4, Lactiferous Sinus; c, c, Acini; 
d, Elastic or Dartoid Tissue of the Teat; ¢, Orifice of the Teat. 
In the Pig the mamme are ten or twelve in 
number, disposed by pairs in two parallel rows, 
extending from the inguinal region to beneath the 
thorax, and distinguished as inguinal, abdominal, and 
thoracic. They have no sinuses, the lactiferous ducts. 
of each teat joining directly to form a variable number: 
of excretory ducts which open at the free extremity of 
the teat by from five to ten orifices. 
The Bitch has from eight to ten mamme, arranged 
as in the Pig. 
The special function of these glands is the 
secretion of milk. 
