ANATOMY. 25 
masses, distinct from each other, and having in their 
centre the teat, nipple, or mammilla. They are 
composed of a yellow elastic fibrous envelope, glandular 
tissue made up of acini, clustered in groups around the 
lactiferous ducts, which by their union open into the 
_ galactophorous sinuses, from which arise the true 
excretory canals of the glands. 
\\\ ANI 
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Fic. 32. 
SECTION OF UDDER OF Cow. 
a, Anterior Quarter; 4, Posterior Quarter; g, Septum between the Quarters; 
c, ¢, Section of the Lactiferous Ducts; d, d, Lactiferous Sinus or Milk 
Cistern; ¢, ¢, Orifice of the Teat; 4 Large Lymph Gland in the Posterior 
Quarter. , 
In the Cow the mammez are also inguinal, and are 
composed of two symmetrical halves placed one against 
the other. Each half is again divided into two distinct 
glands, each with its own teat, so that the vessel 
consists of four mammz and four teats; behind this 
there may be two small rudimentary teats. In the 
centre of each quarter, just at the base of the teat, is a 
large galactophorous sinus, the general receptacle of 
all the lactiferous conduits. 
