. On the anatomy of vertebrates [electronic resource] . Skull of the Ox {Bos taurus). is formed by the frontals, fig. 321, c: the parietals, which, atan earlier period, encroach upon the back part of the upper sur-face, are now pushed quite to the posterior or occipital deposition does not take place in the Bison, fig. 320, but thefrontals, at the interspace between the horns, are, with the con-joined parietals, 9, developed into a ridge rising above that formedby the superoccipital, 11. The petro-tympanic, fig, 320,10, 321, e,is prominent and rough. The squamosal, e, has a venous
. On the anatomy of vertebrates [electronic resource] . Skull of the Ox {Bos taurus). is formed by the frontals, fig. 321, c: the parietals, which, atan earlier period, encroach upon the back part of the upper sur-face, are now pushed quite to the posterior or occipital deposition does not take place in the Bison, fig. 320, but thefrontals, at the interspace between the horns, are, with the con-joined parietals, 9, developed into a ridge rising above that formedby the superoccipital, 11. The petro-tympanic, fig, 320,10, 321, e,is prominent and rough. The squamosal, e, has a venous outletabove the base of the zygoma. The malar forms the lower part. Skull of the Gaur, from behind. SKELETON OF ARTIODACTYLA. 473 of the orbit and extends largely upon the face, at k, to join themaxillary, h. The corresponding plate of the lacrymal is stillmore extensive and here joins the nasal, f, leaving a small fissurebetween those bones and the frontal, c. This very extensive bonehas a large superorbital fissure. The nasals are cleft at theirfore end. The premaxillary, g, has but a small or loose junctionwith the nasals. The maxillary, h, is extensive, the antorbitalforamen, h, perforates it above the first premolar. In Bisojieuropceus the horns arise in advance of the ridge formed by thesuperoccipital bone, the parietals advancing to the upper surfaceof the skull and being interposed between the frontal and super-occipital. The Bison differs from the Buffalo (Bubalus) in thegreater breadth and convexity of the frontal, and in the muchgreater extent of the orbital processes of that bone, which, with thecoextensive processes of the lacrymal and ma
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