. The comparative anatomy of the domesticated animals. Veterinary anatomy. Fi^. 82. 138 THE ARTICULATIONS. with regard to these articulations, as it will be found sufficient to call to mind the topographical description of each piece entering into their formation. 4. Temporo-maxillary Articulation. {Preparation.—Eemove the masseter muscle and the parotid gland. Saw through the head about the middle line. Open the articulation externally to exhibit tlie inter- arlicular meniscus.) The lower jaw, in its imion with the cranium, constitutes a double condyloid articulation. Articular surfaces.—With
. The comparative anatomy of the domesticated animals. Veterinary anatomy. Fi^. 82. 138 THE ARTICULATIONS. with regard to these articulations, as it will be found sufficient to call to mind the topographical description of each piece entering into their formation. 4. Temporo-maxillary Articulation. {Preparation.—Eemove the masseter muscle and the parotid gland. Saw through the head about the middle line. Open the articulation externally to exhibit tlie inter- arlicular meniscus.) The lower jaw, in its imion with the cranium, constitutes a double condyloid articulation. Articular surfaces.—With the temporal bone, these are the condyle, the glenoid cavity, and the supracondyloid process which exists at the base of the zygomatic process. The glenoid cavity is not lined by cartilage, and appears to be merely covered by synovial membrane. With the maxillary bone there is the oblong condyle situated in front of the coronoid process. Interarticular fibro-cartilage.—The articular surfaces just named are far from fitting each other accurately; this is only accomplished by the interposition of a fibro-cartilaginous disc between the temporal and maxillary bones. This disc is a kind of irregular plate, flattened above and below, thicker before than behind, and moulded on each of the diarthrodial surfaces it separates. Its superior face, therefore, presents: in front, a cavity to receive the condyle of the temporal bone; behind, a boss which is lodged in the glenoid cavity. The inferior face is hollowed by an oblong fossa in which the maxillary con- dyle is lodged. Mode of union.—A fibrous envelope—a true capsular ligament—surrounds the articulation, and is attached by its borders to the margin of 1, InterarticulLi^fibro-cartilage; the articular surfaces it unites. Formed, out- 2, External fasciculus of the wardly, by a thick fasciculus of white vertical capsular ligament.—A, Base of fibres (Fig. 82, 2), this ligament becomes grey- the coronoid process; J.^Neck igj
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