155—68 CEANIA OP EIJMINANTS PEOM THE INDIAN TEETIAEIES. 
The cranium is slighter larger than that of the living Indian Antilope 
ceroicapra, a figure of the cranium of which species will he found in the “ British 
Museum Catalogue of Ungulates,” 1853 {Flate VIII, fig. 3). The horn-cores of 
Antilope sivalensis, if, as is almost certainly the case, the cranium (No. S.573) in 
the Asiatic Society’s collection belongs to this species, were not spirally twisted ; 
otherwise the general form of the crania of A. sivalensis and A. cervicapra is 
almost identical, and the two animals were no doubt very closely allied. Most of 
the sutures in the present specimen are still visible, and the outline of the com- 
ponent bones can therefore be determined with exactness. 
The inclination of the basi-cranial axis in the cranium of Antilope sivalensis 
forms a rather smaller angle with the plane of the palate than in the recent species ; 
and consequently the whole of the cranial portion of the skull is placed more below 
the level of the palatal plane. In Antilope cervicapra, if the line of the outer border 
of the molar alveolus be produced backwards, it will be found to cut the lower 
extremity of the occipital condyles ; in the cranium of Antilope sivalensis a similar 
line will cut the occiput immediately above the foramen magnum. In the same 
manner the apertm’e of the meatus auditorius externus in the recent species is 
placed very slightly below the dental border of the orbit, while in the fossil 
species the same aperture is placed very considerably below the corresponding 
orbital boundary. 
The occiput in both species is identical in form, being bounded above by the very 
prominent and overhanging crest or superior curved line, and having a large 
tuberosity for the attachment of the ligamentum nuchse ; the supra-occipital is, 
however, rather narrower in the fossil species, the indentations of the temporal 
fossae extending to a rather larger extent on to the superior surface of the 
cerebral chamber. The parieto-frontal sutm’e in both species forms a doubly curved 
line across the skull, immediately behind the horn-cores. Externally to the horn- 
cores the superior surface of the orbit in the recent species forms a flat surface 
placed at right angles to the outer surface of the horn-core ; in the fossil species 
the two surfaces slope imperceptibly one into the other, without any angulation 
at the junction. As far as can be judged from its broken condition, the orbit of 
the fossil species seems to have possessed the same straight dental border which 
is characteristic of the recent species. 
The concavity which occurs between the orbits, immediately below the horn -cores 
in Antilope cervicapra, is wanting in Antilope sivalensis, this surface being plane, 
and without any ridge running obliquely from the horn-core to the orbit. The 
horn-cores of A. sivalensis rise nearly vertically from the f rentals, with a small 
interval between their bases, the supra-orbital foramina pierce the bases of the horn- 
cores, and have no large sinus at their mouth. The nasals extend upwards 
nearly to the middle of the orbits ; the plane of the frontal is nearly at right angles 
to that of the laclmymal ; there is a notch in the anterior border of the orbit at the 
commencement of the lachrymo-frontal suture : the lower extremity of the frontal 
