125—88 CEANIA OE EUMINANTS EEOM THE INDIAN TEETIAEIES. 
The crowns of the molars have wide central enamel islands, the second being 
infolded on the posterior side ; the median accessory column on the inner side 
is large, with a contracted neck. The dimensions of this skull are given 
below : — 
Width at superior border of orbits 
„ at contraction above „ 
„ at „ below „ ... 
„ of frontals between upper angles of horn-cores 
„ „ lower „ „ 
Greatest width of occipital crest 
Interval between external angles of occipital condyles 
Width of occiput between temporal fossae 
Height from lower border of foramen magnum to occipital cres 
Distance between occipital crest and vertex cranii 
Antero-posterior diameter of right orbit 
Transverse „ „ . . 
Width of palate at 3rd molars 
Interval between outer surfaces of'Srd molars . 
Distance from inferior border of foramen magnum to last mola 
Length of last molar .... 
„ of two molars .... 
„ from vertex cranii to apex of nasals 
„ of temporal fossae . ^ . 
Circumference of base of right horn-core 
Antero-posterior diameter of „ 
Transverse „ „ 
Antero-posterior diameter at fracture of ditto 
Length of fragment of ditto 
9-5 
8-7 
5- 6 
8-2 
10-3 
6 - 8 
3- 9 
4- 0 
4-8 
3-4 
2-2 
2-2 
3-4 
1- 4 
27 
5-5 
5-2 
100 
3-4 
2 - 6 
31 
5-6 
In the shape of the horn-cores, in their position below the highest point of the 
cranium, in the projection of the occipital crest between them, and in the form of 
the broad frontals and the salient orbits, the cranium of this species is at once seen 
to be widely separated from aU the preceding species, and equally widely from all 
recent species of the genera Bubakis, Bibos, and Bos ; the same characters also shew 
its agreement with the crania of the genus Bison and the genus or sub-genus 
Boephagus, under the former of which I have placed the species, for reasons which 
I will immediately shew. 
Unfortunately I have been unable to obtain a perfect cranium of the Yak 
{Bison or Boephagus grunniens) to compare with this specimen ; the Indian Museum 
has no specimen of the cranium of the latter genus, with the exception of one 
imperfect skull of a calf, wanting the occiput, and in which the characteristic 
points are not developed, and the frontlet of a cross-bred animal between the Yak 
and the Indian Ox ; my comparisons, therefore, cannot be so accurate as I could have 
wished. A lateral and a front view of the cranium of Boephagus grunniens are 
given in Dr. Gray’s Catalogue of the Ungulataof the British Museum, 1853 {Blate 4), 
together with corresponding figures of the cranium of Bison americanus, both on 
a small scale. Figures of the frontal and occipital regions of the cranium of 
