AND MEDULLA SPINALIS. 
329 
his Lectures ; if he does, he merely glances at it, and does not 
enter into the minutiae of the case, nor acknowledge from what 
source it came. This is my reason for wishing to rescue the case 
from obscurity, and make it more public, with that of Mr. Rose, 
through the medium of The Veterinarian. 
The most remarkable feature in these cases is, the sudden and 
strange effects caused by the grubs, as they, unquestionably, 
must have been some time growing to such magnitude. The 
effects were so violent, that death soon terminated the sufferings 
of the colt; and, undoubtedly, the like result would have taken 
place with the pony, had she not been destroyed. The grub, 
or its ova, must have been taken and deposited in the spinal 
marrow by the medium of the circulation, and nourished and 
brought to maturity there, as the theca vertebralis was quite 
perfect; which shews it was impossible to get there by any other 
means. 
These cases have some resemblance to the ascarides found in 
horses’ eyes in India, which are generally supposed to be conveyed 
to that organ by the arterial system of bloodvessels ; but they do 
not shew their effects so soon. I have seen them floating about 
in the aqueous humour two or three days previous to inflamma- 
tion and opacity of the cornea taking place. Happily, we have 
an excellent remedy for this disease, viz. the lancet. 
In reference to worms in the eyes of horses in India, I recollect 
that I opened a yearling colt that had never been housed, and 
that died in the field 'from enteritis, in the year 1825. After 
opening the animal, I removed the eyes from the orbits in order to 
dissect them. On inspecting them prior to dissection, I distinctly 
saw four or five ascarides in the aqueous humour, the cornea 
being very clear. On cutting through it the worms escaped. 
This is the only case I have seen or heard of in England, but I 
have seen a great many in the eyes of deer. 
[Hydatids in the spinal cord have been occasional but very un- 
frequent causes of death, in the first and second years of the 
life of the sheep. M. Girard relates a case in which the last 
dorsal vertebra but one was opened in a sheep that seemed 
to suffer from some spinal or cerebral disease. The cord ap- 
peared to be unusually tumefied at this spot, and the theca was 
no sooner cut than out sprung an ovoid vesicle — an hydatid. 
M. Dupuy found one in the middle of the lumbar portion of 
the spinal cord of a lamb. The only symptom that had been 
observed was paraplegia. 
The only two species of entozoa that have been observed in 
the nervous centres of the human being are the acephalocysts 
