. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCLES OF THE TRUNK. 291 internus in Ruminants is nearer the middle line than in the Horse. Its obliquity is also greater, and the movements of diduction it gives the lower jaw are more extensive. In all the animals, other than Solipeds, the stylo-maxillaris fasciculus of the digastricus is entirely absent, and the muscle has only a single belly extending directly from the occipital to the maxillary bone. In the Ox is found a siball square muscle, formed of transverse fibres, which unites the two digastric muscles by p
. The comparative anatomy of the domesticated animals. Veterinary anatomy. MUSCLES OF THE TRUNK. 291 internus in Ruminants is nearer the middle line than in the Horse. Its obliquity is also greater, and the movements of diduction it gives the lower jaw are more extensive. In all the animals, other than Solipeds, the stylo-maxillaris fasciculus of the digastricus is entirely absent, and the muscle has only a single belly extending directly from the occipital to the maxillary bone. In the Ox is found a siball square muscle, formed of transverse fibres, which unites the two digastric muscles by passing beneath the base of the tongue. This muscle, in contracting, may raise the hyoideal apparatus, and in this way supplement the tendon of the digastricua and the inferior ring of the stylo-hyoideus. 4. Hyoideal Region. The two flesliy planes composing the mylo-hyoideus are more distinct in Ruminants than in the Horse. The stylo-hyoideus of these animals commences by a long thin tendon. The muscle has no ring for the passage of the digastricus. a feature observed in all the domesticated animals except Solipeds. In the Carnivora, the stylo-hyoideus, formed by a narrow, very thin, and pale fleshy band, commences on the mastoid portion of the temporal bone by a small tendon; the lerato-hyoideus is remarkable for its relatively considerable volume; the occipito- styloideus and the hyoideus transversus are absent. COMPAEISON OF THE MOSCLES OF THE HuMAN HeAD â WITH THOSE OF THE DOMESTICATED AnIMALS. In Man, there are described as muscles of the head, the epicranial muscles, muscles of the face, and those of the lower jaw. The hyoid and digastric muscles are reckoned in the region of the neck. Here tliey will be placed in the region of the head. 1. Epicranial Muscles. The middle portion of the human cranium is covered by an aponeurosis that adheres closely to the hairy scalp, but glides easily on the surface of the bones. To the circumference of this epicranial aponeurosis are at
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