223—46 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
Width at post-orbital processes 5'45 
Interval between incisors and the same' 9-3 
Width between orbits 4- 7 
,, over canines . 4.8 
Length from incisive alveoli to posterior margin of palate . . . . 7'3 
Width of palate between carnassials 3-35 
Interval between canines 2'7 
Length of last three cheek-teeth 3 -44 
Length of pm. 4 1’3 
Width „ „ „ (at middle) 0-78 
Length ,, m. 1 . 1'2 
Width 1-05 
Length ,, ,, 2 1*1 
Width „ „ „ . . . . . . . 1-2 
Antero -posterior diameter of canine l - 7 
Transverse ,,,, ,, l'O 
Mandible . — The one known specimen of the mandible of this species was also 
obtained by Messrs. Falconer and Cantley from the typical Siwaliks, and is now in 
the British Museum (No. 39,722). It comprizes the greater part of the horizontal 
ramus of the right side ; and is figured from the outer side (reversed) in plate 0, fig. 2 
of the “Fauna Antiqua Sivalensis ” (-§-), and in vol. I., plate XXVI., fig. 3, of the 
% Palaeontological Memoirs” (^): it is also figured from the dental aspect in fig. 2a. 
of the former plate (y), and in figure 4 of the latter (f) : and in plate CXXXI., figs. 
3 and 4 of Prof. Owen’s “ Odontography ” (A). According to the description of 
Dr. Falconer this specimen is broken off where the canine emerges from its alveolus ; 
the embedded portion of that tooth presenting an antero-posterior diameter of 1*6 
inches, and a transverse of 0-95 inch. The cheek-teeth are six in number, but of 
the two. first and the last only the alveoli remain. The teeth are much worn, 
indicating the advanced age of the animal. The first alveolus is placed a short 
distance behind the canine, and consists of a single cavity, which probably bore the 
second premolar (pin. 2) : there is no indication of the existence of pm. 1 , which is 
commonly developed in Ursns. The second alveolus is placed very close to the first, 
and also to the succeeding tooth : it must have carried the third premolar (pm. 3) ; 
and there could not have been another tooth between this and the first alveolus. 
The fourth premolar is a distinctly trilobed tooth, and is relatively larger than in 
the genus Ursus ; — being in fact about f the length of m72, whereas in the latter it 
is about i the same length. From the relatively large size of this tooth it is inferred, 
as already mentioned, that the two alveoli in advance of the upper carnassial indicate 
that pm. 3 was a relatively large tooth inserted by two fangs. “ The antepenultimate 
or carnassier is so defaced 1 as to give no indication of form to notice, except its 
length. The pemdtimate or first tubercular molar [m. 2] is oblong. It is broader 
for its length than generally holds in the genus [Ursits], and the crown is less 
complicated with tubercles. Of the rear tubercular (m. 3) the socket alone remains, 
the tooth having fallen out. It is situated with considerable obliquity to the rest of 
Misprinted d'fimd in Dr. Falconer’s memoir. 
