STRONGYLUS ARMATUS. 
365 
These verminous aneurisms have only been seen in the 
equidas—horse, ass, mule and hemione. 
According to Semmer, at Dorpat all the foals, without 
sxception, have verminous aneurisms. Mather has witnessed 
\ kind of epizooty break out among foals, consisting of ver¬ 
minous aneurisms of the aorta, near the origin of the renal 
irteries. 
These aneurisms are seen only on certain visceral branches 
)f the posterior aorta, and exceptionally on the posterior 
lorta itself. In sixty-five horses, Hering has noted aneurism 
)f the trunk of the great mesenteric artery in seven cases; 
he coeliac artery in fifty-nine cases; the cascal artery in 
eighteen cases ; the artery of the small intestine in sixteen 
:ases; the small mesenteric artery in two cases; the coeliac 
runk in two cases; the hepatic artery in three cases; and in 
he renal artery in one case. It is not uncommon to find more 
han one aneurism in the same horse. 
In thirty-five horses, Bollinger counted sixty aneurisms; 
ind in adding these to one hundred and eight seen by Hering 
n sixty-five horses, he reckoned that in one hundred horses 
here were one hundred and sixty-eight aneurisms, of which 
>ne hundred and fifty-three were in the large mesenteric 
rtery and its branches, four in the coeliac trunk, three in the 
iepatic artery, three in the small mesenteric artery, three in 
he renal arteries, and two in the posterior aorta. In one 
undred horses, ninety to ninety-four had one or more ver- 
ainous aneurisms. Sclerostomes were also several times 
ound in the spermatic artery, and on three occasions in the 
erebral arteries. Lastly, Roll indicates them as being found 
n the vena cava, and, according to Valentine, a specimen 
pas discovered in the vena portae, at the Berne Veterinary 
chool. 
The young form of the armed sclerostome—the aneuris- 
lal sclerostome—is found in various arteries in the horse, 
nd those of the brain are not exempt. Three observations 
ave been published. 
Albrecht reports the case of a horse which, during work, 
uddenly began to stagger ; the eyes were fixed, and the res- 
