SIWALIK AND NARBADA BUNODONT SUINA. 
55—89 
Kolsa, Punjab : the corresponding fragment of the left ramus was obtained at the same 
time, as well as the extremity of the symphysis, one half of which is represented in 
fig. 1 9 of the same plate. The first and second molars are much worn, and m. y is about 
half worn down, showing that the specimen belonged to an aged animal. The structure 
of m. 3 sliows that the specimen belonged to the present form ; and the dimensions 
of the teeth indicate an individual of about the same size as that to which the upper 
molars represented in fig. 17 belonged : the great width of the teeth probably 
indicates that the specimen belonged to a male. In fig. 18 of the same plate there 
is represented a fragment of the left ramus of a somewhat similar mandible, from 
the Punjab, containing a fragment of m. 2, and 1^3 imperfect on the outer side : this 
tooth is almost unworn, and from being slightly smaller and relatively rather 
narrower than the corresponding tooth of the last specimen it is probable that the 
present specimen belonged to a female individual. In figs. 20 and 4 of the same 
plate there are represented two fragments of the left ramus of mandibles of a 
species of the present genus ; also from the Siwaliks of the Punjab. The second of 
these specimens contains the three true molars, and a fragment of pm. 4 ; whilst the 
first contains m. 3 and a part of m. 2, these teeth being rather more worn than in the 
first specimen. The teeth of the specimen represented in fig. 4 agree in relative size 
with those of one of the small crania in the Indian Museum noticed on page 87 
(No. B. 63), and from the great difference in size between them and the teetli of the 
specimen represented in fig. 3 it is quite possible that tlie present specimen and the 
crania belong to a small form, which may be specifically distinct from H. sivalensis. 
There is, however, such an amount of variation in the size of the different specimens, 
which apparently present no distinctive structural points, that nothing would be 
gained by attempting to separate them. The dimensions of the teeth of the four 
specimens described above (taken in the same order) are as follows, viz .\ — 
Length, of m. 2 
0-86 
0-71 
Width „ „ „ . . 
0'7 
0-59 
0-5 
Length „ 3 
1-77 
1-6 
1-35 
1-25 
Width )))>)) 
CO 
o 
0-68 
0-6 
0-53 
In structure the lower molars are precisely analogous to the upper ; but the 
talon of m73 is perhaps rather larger in proportion to that of m. 3 than is usually the 
case in true pigs. In the number of the columns composing its talon m. 3 (pi. XII., 
fig. 18) corresponds with Sus titan (pi. VII., fig. 4j rather than with 8. falconeri [ibid^ 
fig. 2). A comparison of the figures will show how m. 3 is formed by an amplification 
of the plan of that of the corresponding tooth of 8. titan, in the same way as has 
been shown to be the case with m. 3 5 the tooth of 8. falconeri being in some respects 
intermediate. 
The symphysis belonging to the first of the foregoing specimens, of which the 
left side is represented in fig. 19, shows the three incisors, and the broken bases of 
the canine and pm. 1 . The latter was inserted by a compressed conj oint fang, and 
was evidently relatively larger than in Bus ; it is separated by a very short interval 
both from pm. 2 and the canine. The canine (c) is not of larger diameter than the 
o 
