SOCIETY MEETINGS. 
S73 
of the saliva adhere, forming roundish or mulberry concretions 
blocking lip the duct, which becomes enlarged and distended 
with saliva. Sometimes an oat insinuates itself into the orifice 
of the parotid duct, producing distension of it by saliva, causing 
It to appear as a pendulous sac on the borders of the jaw The 
concretion is only remarked after it has attained a certain size. 
It appears as_ a hard, sharply defined, slightly movable swelling, 
genera y yi^>ig on the outer surface of the jaw, close to the 
front of the buccal opening of Steno’s duct, but sometimes on 
the posterior border of the under jaw. The salivary duct is 
usimlly distended behind the swelling, and when the flow of 
saliva is entirely shut off the gland is enlarged. Inflammation 
IS seldom present, but may appear and lead to formation of ab- 
scesses. Unsound. 
Polypi. A polypus may be defined to be a tumor attached by 
means of a narrow pedicle, and the most familiar example is 
the nasal polypus, attached to the superior part of the nostril. 
It IS of sottish consistence ; bleeding when injured: often con- 
taining a limpid fluid in its centre, growing downwards, filling 
le cavity of the nostril, causing much uneasiness to the animal 
mid interfering very materially with the respiratory function. 
There is a discharge from the affected nostril, causing much 
uneasiness to the animal, often tinged with blood, especially 
during exercise or work. The animal makes a snuffling sound 
111 its breathing and frequently sneezes. The tumor cannot al¬ 
ways be seen, but by growth becomes visible to the examiner 
Soinetimes it grows in the contrary direction and falls into 
the isthmus and is apt to become temporarily lodged in the 
larynx, causing the animal to breathe with the greatest diffi¬ 
culty, with a loud roaring sound and often to fall down from ex¬ 
haustion and want of breath. By great effort the animal coughs 
the obstructing tumor from the larynx into the fauces again 
and then the roaring sound and difficulty of breathing disap- 
pear. This is an unsoundness. 
Nasal Catarrh.—Catarrh means a discharge of fluid from the 
mucous membrane. The form of catarrh under present con¬ 
sideration is at first a congestion, followed by inflammation of 
the mucous membrane of the nasal chamber—the Schneiderian 
or pituitary membrane, as it is specifically termed. The inflam¬ 
mation usually extends to the membrane of the sinuses of the 
head and often to the membrane of the larynx and pharynx 
causing the complication of sore throat. Quite frequently the 
membrane of the eyes is also affected, as eyidenced by its con- 
