mOCEEDINGS OF THE VETERINARY SCHOOL AT ALFORT. 33 
Salivary Calculus. —One of the form and size of an 
almond was found in the excretory duct of one of the maxillary 
glands of the same horse. The complete obstruction of the 
canal was accompanied by a transformation of the gland into a 
lardaceous mass, in the middle of which were several large 
cavities filled with a mucous fluid, communicating with the 
excretory duct, and seeming to be considerably dilated ramifica¬ 
tions of it. M. Rigot has often seen the same organic change 
in similar cases, and also after tying the parotid duct; and it 
has been always preceded by inflammation of the glandular sub¬ 
stance. 
Ossification of the Abdominal Aorta.—A horse pre¬ 
sented a complete ossification of this vessel, from the origin of 
the sub-diaphragmatic arteries to that of the renal ones. A 
fibrous clot was found in this part of the artery, half obliterating 
its calibre. The cellular tissue of the hind limbs was infiltrated 
with serosity. M. Rigot has already observed these serous 
infiltrations at the time of obstruction either of the arterial or 
venous circulation, and effusions of the same kind in the peri¬ 
toneal cavity, accompanied by induration of the liver. 
A CYST IN THE Spleen. —A Spheroidal cyst, seven pounds 
in weight, and filled with fibrine, not discoloured, was found in 
the substance of the spleen of a horse. No alteration was ob¬ 
served in the tissue of the organ, not even where it was in 
immediate contact with the parietes of the cyst. 
M. Renault, several years ago, deposited a similar production 
in the museum. 
Foreign Bodies in the Guttural Pouch.— A biscayen, 
about an inch in diameter, was found in the left guttural pouch 
of a horse. A cicatrix on the skin, and in the thickness of the 
parotid behind the facial artery, indicated the path which this 
projectile took in order to penetrate into the guttural pouch. 
Its continuance there had caused the formation of a great quan¬ 
tity of pus. 
Insufflation of the Lungs. —Insufflation of the lune:s 
of a horse, made as far as possible within the limits of ordinary 
respiration, having discovered to M. Rigot, that different por¬ 
tions of these organs were unequally permeable to air, and that 
where that permeability is most easy and pronqit, interlobular 
and siib-plcural emphysema is oftenest found, that jirofessor 
asks, whether this coincidence does not warrant him in sup¬ 
posing that these portions are most constaiitly in action during 
the life of the animal. 
!• 
VOL. \IfI. 
