26 . VETERINARY OBSTETRICS. 



In the small ruminants there are two mammae and 

 two teats, constructed like those of the Cow. 



Fig. 13. 

 Section of the Cow's Teat. 



a, a. Principal Lactiferous Ducts; b, Lactiferous Sinus; c, c. Acini; 

 d. Elastic or Dartoid Tissue of the Teat; e, Orifice of the Teat. 



In the Pig the mammae 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 mammae, arranged 

 as in the Pig. 



The special function of these glands is the 

 secretion of mi!tk. 



