115—28 CEANIA OE EUMINANTS EEOM THE INDIAN TEETIAEIES, 
of the frontals. The hasi-occipital is triangular, and characterised by the very 
large size of the posterior pair of tubercles, and the small size of the anterior pair. 
The dimensions of the specimen are given below : — 
Interval between occipital crest and intercomual ridge 
1-8 
Width at superior border of orbits .... 
11-0 
„ at constriction above orbits .... 
8-7 
Height from lower border of foramen magnum to occipital crest 
5-8 
Distance from occipital crest to apex of nasals . 
130 
Length of intercomual ridge .... 
5*0 
Width of occiput through petrosals .... 
11-4 
Interval between extremities of temporal fossae . . . 
6-2 
„ between orbit and base of hom-core 
4-0 
Antero-posterior diameter of left orbit .... 
2-6 
Transverse „ „ . . . . 
2-4 
Length of temporal fossae 
5-8 
Antero-posterior diameter of left horn-core at base 
6-0 
Transverse „ „ „ . . 
4T 
Circumference „ „ „ . . 
170 
„ „ „ at broken extremity . 
7 0 
Length of ditto along upper curvature .... 
49-0 
„ „ lower ditto .... 
39-0 
Interval between broken extremities .... 
87-0 
Erom the above description it will be gathered that the present cranium 
presents a combination of characters which render it difidcult to assign it to any one 
of the recent genera of Bovina, without infringing on their definitions. The form 
of the occiput is, however, sufficient to distinguish it at once from Bihos and Bubalus 
by the high position of the occipital crest and the small size of the indentations of 
the temporal fossse ; it is also separated from the latter genus by the acute angle 
which the plane of the occiput makes with that of the frontals. In the following 
points the present specimen agrees with the cranium of Bos : — 
The acute angle formed by the planes of the frontals and oeciput. 
The position of the horn-cores on the highest ridge of the skull, directly above 
the plane of the occiput. 
The excess of the antero-posterior over the transverse diameter of the forehead. 
The small intrusion of the temporal fossae on to the surface of the occiput. 
The long interval between the base of the horn-core and the orbit. 
The parallelism of the anterior border of the orbit with the long axis of the 
cranium. 
The convexity of the upper eurve of the horn-cores. 
On the other hand, it differs from all other species of Bos in the peculiar con- 
vexity of the frontals. Professor Owen made the flatness of the forehead a distinct- 
ive character of the genus ; this, however, is not taken as a character by Dr. Gray 
in his Museum catalogue, since the forehead of the Indian Ox is slighly convex, and 
is yet admitted into the genus Bos. Moreover, in the above-mentioned Siwalik species 
of O^, Bos planifrons,i}iQ frontals are also slightly convex, although in other charac- 
