325—148 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
line of that crest. The triangular valley included between the frontal ridges in 
front of the parietal crest \_sagittal arcaj, as well as the frontal fossa between the 
post-orbital apophyses, slopes anteriorly, as in F. cristata , and not posteriorly, as in 
other large Felidce. The depth of the mesopterygoid fossa, as well as the length of 
the basicranial axis, is very nearly the same as in the larger individuals of the 
tiger ; but the breadth of the cranium at the zygomatic arches is proportionately 
much smaller than in the latter.” 
In the following table the dimensions of this specimen are compared with the 
corresponding dimensions of the type skull of F. cristata, and of the larger of the 
two tigers’ skulls mentioned on page 321 : — 
F. cristata. 
(type) 
Interval between inferior border of foramen magnum and posterior 
border of palate 4 - 5 
Depth of mesopterygoid fossa 
Extreme zygomatic width 7'6 
Width of frontals across post-orbitals 3*1 
Interval between post -orbital process and hinder border of condyle. . 6'36 
,, ,, outer borders of condyles 2-2 
Length of pm. 4 15 
Specimen. 
5-07 
1-02 
5- 42 1 
3-3G 
6- 9 
2-46 2 
1-45 
F. tigris. 
4-32 
0- 9 
8-16 
3-95 
6-2 
2-05 
1- 39 
The hinder part of the inferior surface of the present, specimen has the same 
characteristic points as the type skull of F. cristata , the large mastoid process being 
especially noticeable. The form and position of the zygoma is also the same in the 
two ; while, as Mr. Bose observes, the frontals have the same concavity, small post- 
orbital processes, and strong temporal ridges. The only characters of any importance 
noticed- by Mr. Bose as distinguishing the two skulls, are the larger size of the 
present specimen, and its more strongly developed sagittal crest ; but these differences 
are not greater than those in different individuals of the lion or tiger. The 
pre-glenoid process of the present specimen is very strongly developed. 
In comparing the fossil with the skull of the tiger Mr. Bose concludes that the 
zygomatic width was less in the former than in the latter ; the comparison having 
been made on the evidence of the post-palatal length of the base of the skull. The 
dimensions of the type skull of F. cristata show, however, that such a comparison 
gives a false result, owing to the relatively greater length of the post-palatal portion 
of the fossil skull as compared with that of the tiger. The present specimen 
was probably not much, if at all, longer than the tiger’s skull with which it is 
compared above ; but had a proportionately wider zygoma, larger occipital condyles, 
a longer cranial, and (probably) a shorter facial portion, a longer pin. 4 , and narrower 
frontals. 
Seeing, therefore, that the present specimen differs from F. tigris in precisely 
the same points as the type skull of F. cristata ; while it only differs from the latter 
in characters that need not be of more than individual or sexual value, there is every 
probability that the two fossil skulls should be referred to the same species ; the 
present specimen having probably belonged to a very old male. 
l Given by Mr. Bose as 8 • 1 2. 2 Given by Mr. Bose as 2 ■ 77. 
