218 
PROFESSOR RIGOT'S 
exterior membrane of the ureters, we have constantly, in animals 
recently killed, applied a stimulus to these textures, and we have 
always produced evident contraction. We have, many times, 
and under similar circumstances, repeated this experiment on 
various excretory ducts (canaux effereris), and on the ductus 
choledochus, with precisely the same results ; so that we are now 
enabled to state that the elementary tissue in all these organs is 
the same. The same structure must be acknowledged to exist 
in the salivary ducts, or, at least, in those of the parotid gland; 
especially if we consider, in the first place, that the saliva is 
darted out in a jet from any opening in the parotid duct, when¬ 
ever the food which he likes is placed before a half-famished 
animal; and, in the second place, that the parotid ducts receive, 
as we are assured, many fibres from the facial nerve, which is, 
as is well known, one of those that preside over the movements 
of the muscular portions of the face. 
Among the pathologico-anatomical facts which we have col¬ 
lected during this year, is a case of spontaneous and recent 
rupture of two of the internal ligaments of the coxo-femoral arti¬ 
culation (the hip-joint), without displacement of the articular 
surfaces, and without rupture or even distention of the synovial 
membrane, or of the membraniform ligament which surrounded 
it. The horse in which this lesion was observed halted in his 
hind limbs, in nearly the way that is observed in sprain of the 
loins, or in enlargement of the spermatic cord. Another horse, 
that had a hard and indolent enlargement of the knee, to our 
great astonishment presented a rupture of the central fibres of 
the perforans tendon, where it passes under the carpian arch. 
The circular fibres of the tendon, perfectly uninjured for a line in 
thickness, formed the walls of a cavity nearly two inches in 
length, which contained nothing but the lacerated extremities of 
the small bundles of fibres. 
On the post-mortem examination of a horse that was lame in 
the shoulder, we found, at the point of insertion of the tendon 
common to the great dorsal muscle and the long adductor of the 
arm, an osseous production of an irregular surface, which com¬ 
pressed the nervous branches of the brachial plexus descend¬ 
ing on the inside of the humerus. The neurilema and the 
