305—128 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
the whole of the premolars are extremely low. In pm. 3 there is a hind talon, but 
considerably smaller than that of II. striata ; while there is a mere trace of the 
anterior talon : the crown forms a regular ellipsoidal cone, which is set obliquely to 
the molar alveoli, but less so than in H. striata ; its hinder ridge being within, instead 
of without, the extremity of pm, 4 . In pm. 2 there is a small hind talon, and, as in 
pm. 3 , a distinct cingulum on the hinder half of the inner side : there is no distinct 
anterior talon, and the tooth is set much less obliquely to the molar alveoli than in E. 
striata ; the hind talon being placed opposite the middle of the anterior border of p m. 3 , 
instead of entirely on its outer side. A distinct interval occurs between each tooth 
of the premolar series ; whereas in H. striata these teeth are in contact. As will be 
seen from the dimensions given below, the premolars are relatively slightly narrower 
than in that species. The canine is too battered for description. 
Before proceeding to the consideration of the skull itself, it will be simpler to 
give its dimensions, which are compared below with those of II. striata and II. 
macrostoma. 
H. striata. 
Width of palate at pm. 4 3-5 
„ „ „ „ 3 . . . ... . . . 3-22 
,, „ ,, behind canine 2’0 
Interval between anterior border of foramen magnum and canine . 7 '05 
„ ,, canine and middle of postorbital process of frontal 3 - 6 
,, ,, postorbital process of frontal and occipital condyle 5 - 2 
t) ,, posterior border of palate and canine . . . 3'46 
Width at postorbital processes , . 3-07 
,, below ,, „ 2'06 
Interval between canines • . . 1'2 
,, „ hinder border of pm. 4 and canine . . . 2-87 
,, ,, canine and pm. 2 0-42 
Length of pm. 2 • . . . 0-68 
Width . 0-45 
Length „ „ 3 0'88 
Width „ „ „ 0-6 
Length ,, ,, 4 1"2 
Transverse diameter of m. 1 0-58 
Ant.-post. „ ,,,,,, 0-26 
3-02 
2'25 2 
1-75 
1-18 
2-5 
025 
0-58 
0-39 
0-78 
0- 47 
1- 16 
0-57 
0-28 
H. macrostoma. 
3-7 
2 8 
8-04 
4-2 
4-13 
2-79 
2- 39 
1-18 
3- 46 
0-6 
0-63 (alv.) 
0-35 „ 
1-31 
0-62 
0-3 
It will be seen from these dimensions that the present skull is considerably 
smaller than either of the other two ; and that it differs from the skull of U. 
macrostoma by being shorter and wider (as is well shown by the proportions of the 
palate), and by its shorter and broader premolars. In general form it has a strong 
general resemblance to the skull of II. striata ; but the facial portion is somewhat 
longer in proportion to the cranial, and the facial profile rather more concave. 3 On 
the superior aspect the two skulls are very similar ; the postorbital processes of the 
frontal, though broken in the fossil specimen, having, when complete, been very like 
those of the living species. The curvature and extent of the temporal ridges are 
also very similar in the two : but the frontals of the fossil are slightly concave, in 
1 Taken from tbe original figure. 
2 Broken. 
Compare tbe figures in tbe “ F.A.S. ’ or “ Pal. Mem.” 
