. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE MOUTH. 333 maxilla above the angle of the jaw, and from the crown of the last molar tooth, so as to pass between the curtain of the soft palate on the one part, and the base of the tongue on the other, leaving the latter organ adherent to the lower jaw. Tliis last should bo removed from tlie upper jaw by cutting through the masseter and alveolo-labial mutoles, and so exposing the hard and solt palates in such a manner as to render easy the special dissections Fig. 148. necessary for their study. These dissections ar
. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE MOUTH. 333 maxilla above the angle of the jaw, and from the crown of the last molar tooth, so as to pass between the curtain of the soft palate on the one part, and the base of the tongue on the other, leaving the latter organ adherent to the lower jaw. Tliis last should bo removed from tlie upper jaw by cutting through the masseter and alveolo-labial mutoles, and so exposing the hard and solt palates in such a manner as to render easy the special dissections Fig. 148. necessary for their study. These dissections are limited to the removal of the mucous layer covering the deep venous network, and to the partial excision of this, which allows the artery and palatine nerves to be seen. {See flgm-e 148.) The palate {hard palate), palatine arch, or upper wall of the mouth, is circum- scribed, in front and on the sides, by the superior dental arcade, and limited, behind, by the anterior border of the soft palate. It is a parabolic surface, exactly repre- senting, in its configuration, the bony palate (Fig. 21). _ On its face is remarked a median groove, which partitions it into two equal divisions, and which commences quite in front, at the base of a small tubercle. Curved transverse furrows, twenty in number (Leyh gives from sixteen to eighteen), divide each of these halves into an equal number of salient arches, whose concavities are turned backwards, and which become narrower and less marked as they are more posterior. (These arches and furrows aid in retain- ing the aliment which the tongue carries towards the palate during deglutition). Stkdcturb.—The palatine Hes on the bony vault formed by the palatiae and supermaxillary bones. It includes in its structure: 1. A fibrous membrane, applied to the bone just mentioned, which sustains a re- markably-developed venous network con- stituting a veritable erectile tissue, and gives to the palate a greater or less degree of thickness, according
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