151—64 CHANIA OF RUMINANTS FROM THE INDIAN TERTIARIES. 
figured and other specimens the horn-cores appear to have been directed upwards, 
backwards, and outwards without cmwature ; in transverse section they are rounded 
anteriorly with a ridge posteriorly ; their widest diameter is placed antero-poste- 
riorly ; a slight angulation forms their anterior border, which is continued upwards 
in the line of the face. Behind the intercornual ridge the frontals and parietals 
slope backwards to the occipital crest ; the ante-cornual and post-cornual planes of 
the frontals form an obtuse angle at their junction ; the post-cornual frontal plane 
and the occipital plane also form an obtuse angle at then’ junction. 
The temporal fossse are long and narrow, having a rounded distal border ; the 
orbit is large, and has its antero -posterior diameter rather the larger of the two ; 
from the antero-inferior border of the orbit there is a well marked ridge running 
to the maxillary tubercle above the second premolar. 
The parietals, as in the last genus, form a distinct hand across the cranium 
behind the horn-cores ; the temporal fossse extend slightly on to this upper surface 
of the parietals. The occiput, as in the antelopes, is entirely distinct from the 
parietals, no part of the latter extending on to the plane of the former. The 
occipital crest is- well marked, and considerably overhangs the general plane of the 
occiput ; the occiput is expanded laterally, and the crest and condyles are con- 
sequently approximated ; the paroccipital processes are long and placed unusually 
close to the condyles. 
On the palatal surface the lines of molars are placed rather far apart, and are 
nearly straight ; the palate is vaulted and extends backwards considerably behind 
the last molars ; the molars have a large accessory column. The hasi-occipital is 
wedge-shaped, as in the typical oxen ; the posterior tubercles are large, rounded, and 
scarcely separated from the condyles ; the anterior tubercles are situated consider- 
ably in advance of the posterior pair; they are very small, elongated antero- 
posteriorly, and approximated. 
The dimensions of the specimen drawn in Plate XXIV are as follows : — 
Length from foramen magnum to diastema 
„ „ occipital crest to apex of nasals 
„ of nasals ..... 
Width at superior border of orbit 
„ constriction below „ ... 
„ „ above „ ... 
From lower border of occipital foramen to occipital crest 
Width of occipital through petrosals 
Height from surface of palate to frontals 
Interval between external angles of occipital condyles . 
„ „ occipital crest and superior angle of horn-core 
Length of temporal fossa .... 
Height fi'om distal extremity of palate to surface of frontals 
Interval between horn-core and orbit 
Antero-posterior diameter of right orbit 
Transverse „ „ . . . 
Length of six molars of right side 
Inches. 
. 12-0 
. 8-0 
. 7-8 
. 7-8 
. 5-4 
. 6-5 
. 5-0 
. 8-3 
. 6-1 
. 3-9 
. 1-2 
. 5-5 
. 4-4 
. 2-2 
. ^ 2-4 
. ' 2-0 
. 6-4 
