CASE OF LARYNGITIS. 
529 
imperceptibly, some distance above the hoof, before the ter- 
mination of the hair ; indeed, there is at first no difference, 
microscopically, between it and the epidermis. Immediately 
before the hairs cease to show themselves, however, slender 
villi begin to project from the surface of the true skin, and 
enter what appears to be merely a continuation of the 
epiderm, and the texture of this at once becomes altered in 
consequence : the structure, instead of being merely numerous 
strata of superposed cells laid in one direction, as in the outer 
skin, assumes a fibrous character, and the cells are arranged 
as in the wall. The villi are long and narrow, and increase 
in size after leaving the hair roots until the perioplic fissure 
is reached ; here the periople meets the commencement of 
the wall, and in the fissure the cells on the contiguous sur- 
faces of the two qualities of horn become blended or agglu- 
tinated in a very intimate manner, and grow down together. 
We have already seen that this fissure marks the limit 
between the soft elastic horn of the periople and the dense, 
rigid material composing the wall ; and that the periople and 
frog are continuous, and are nearly, if not quite, identical in 
structure and texture. 
It is scarcely necessary to state that the periople does not 
secrete silex, as has been imagined, or to assert that it is not 
a secretory organ at all ; this will be evident enough to the 
amateur no less than to the scientific student. 
( To be continued .) 
CASE OF LARYNGITIS. 
By T.W.B. and E. L. W. 
On Sunday, July 2nd, we were summoned to attend an 
aged, grey cart-horse, the property of a gentleman, which we 
found to be suffering from acute inflammation of the larynx. 
A quantity of serous exudation and purulent fluid was 
running from his nostrils ; the parotid glands, root of the 
tongue, and the throat in general, were swollen to such an 
extent that the animal was incapable of swallowing anything, 
and had been so for the last eighteen hours. The respiration 
was laboured and accelerated. The pulse numbered 80, and 
was of a character usually denominated inflammatory. The 
body was bedewed with a cold clammy sweat ; the visible 
