THE 
VETERINARIAN. 
VOL. V. 
MAY, 1832. 
No. 53. 
ANATOMY OF THE HORSE. 
[Continued from page 184.] 
OF THE EAR. 
• * . * s - ' * / 
THE organ of hearing is constituted of divers parts, 
which have been arranged in two classes—the external and 
the internal ear. 
The External Ear. 
Comprises the Concha and the Meatus Audit orius Ext emus. 
Concha # . 
The concha or conch, is the term we use to denote the 
zvhole of that part of the organ which is exposed to external view. 
This consists of a flexible, trumpet-shaped, moveable structure, 
erected on either side of the summit of the head, for the purpose 
of collecting the vibrations of sound. Superiorly, the concha 
(which is ordinarily about six inches in length) grows contracted, 
and terminates in a point: inferiorly, it presents a broad, firm, 
circular base or root, so connected with the cranium upon which 
it rests, as to admit of some considerable extent of sliding mo¬ 
tion. Antero-externally appears the aperture or external orifice 
of the concha, ovoid in its outline, and of large dimensions, ex- 
* In general form and external appearance the horse's ear bears no sort 
of comparison with the ear of a man. The external ear of the latter, alto¬ 
gether, has got the appellation of pinna; and on examining the surface of 
a well-formed human ear, we perceive five eminences, the helix , antihelix, 
tragus, antitragus, and lobula; and three cavities, that of the helix , fossa 
navicularis, and concha. 
On the present occasion I have (after the manner of the French Anato¬ 
mists) adopted the term concha as an appellation for the whole external ear: 
its literal signification (a shell) bearing out very well this extended appli¬ 
cation of it. The general cavity, or interior of the external ear, l call the 
couth at cavity.; and the cartilage, which more particularly gives this shell- 
like or trumpet-form to the external ear, the conchal curtilage. 
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