. L'anatomie comparée des animaux domestiques. Anatomie vétérinaire. La tête. épaissies et denticulated, repose sur, et s'unit à, l'apophyse zygomatique de l'os temporal ; la base est large, et est traversé par une ouverture appelée le supra-orUtal superciUarij ou foramen. Les deux régions latérales de la face externe de l'os frontal sont légèrement creusées, et d'aider, pour la plus grande partie de leur mesure, pour former les orbites. Elles montrent souvent, à proximité de la base de l'arche, une petite dépression correspondant à la flexion décrit par le grand muscle oblique de l'oeil dans

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. The comparative anatomy of the domesticated animals. Veterinary anatomy. THE HEAD. thickened and denticulated, rests upon, and is united to, the zygomatic process of the temporal bone ; the base is wide, and is traversed by an opening termed the supra-orUtal, or superciUarij foramen. The two lateral regions of the external face of the frontal bone are slightly excavated, and assist, for the greater portion of their extent, to form the orbits. They often show, near the base of the orbital arch, a small depression corresponding to the flexure described by the great oblique muscle of the eye in passing through its pulley. The interned face of the frontal bone is concave, and divided into two unequal parts by a transverse ridge, corresponding to the anterior border of the cribriform plate of the ethmoid bone. The superior, the most extensive, is covered with digital impressions, and belongs to the cranial cavity. It exhibits : 1. On the median line, a slight furrow, or a crest which is continuous, above, with the median ridge of the parietal bone, and below, with the crista-gaJU process. 2. On the sides, and in the re-entering angle formed by the flexure of the bone, there is a narrow slit, or mortise, which receives the wing of the sphenoid bone. The inferior part is united, on the median line, to the perpendicular plate of the ethmoid. It assists in forming the bottom of the nasal cavities, and presents laterally two large openings which lead to the frontal sinuses—vast anfractuous spaces excavated between the two plates of the bone. Borders.—The superior border is denticulated and cut obliquely in its middle portion, at the expense of the internal plate, and on the lateral parts at the expense of the external table ; it is in contact with the parietal and squamous portion of the temporal bone. The inferior, prolonged to a point in the middle, is in apposition with the nasal bones through the medium of a wide external bevel; laterally, it is very thin, faintly s

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