SIWALIK AND NARBADA BUNODONT SUINA. 
21—55 
the tooth, which forms a stout elongated cone, instead of a flattened ridge as in 
existing Asiatic pigs. 
In plate LXXI., fig. 12 of the “ F.A.S.” there is represented a fragment of a 
maxilla of a large Shvalik pig, now in tlie British Museum, containing the three true 
molars in a rather earlier stage of wear than those of the last specimen. The 
characters of these teeth are precisely similar to those of the latter, although their 
size is slightly less : the length of ui •') being very nearly equal to that of the two 
preceding teeth. There can be no hesitation in referring this specimen to the 
present species. A fragment of another maxilla, containing pm 4 and m. 1 , 
represented in fig. 16 of the same plate, and likewise in the British Museum, may in 
all probability be referred to the same species : pm. 4 is here of average length, but 
has its inner moiety much more developed than in existing Asiatic pigs. 
The following table exhibits the dimensions of the cheek-teeth of the two 
crania, and the first of the two maxillae : the figures in the first column refer to the 
type cranium, those in the second to the cranium of which the dentition is 
represented in plate XI., fig. 2, and those in the third to the detached maxilla. The 
fourth column gives the corresponding dimensions of the cheek-teeth of S. cristatus ; 
viz . : — 
S. giganteus. 
S. cristatus 
Length of three true molars 
3-2 
3-75 3-2 
2-9 
)) 
)) 
m. 1 and m. 2 
1-72 
1-45 
) P 
)) 
pm. 4 . . . 
0-7 
0-7 
0-52 
Width 
M 
>> >> • • 
0-9 
0-8 
0-55 
Length 
)P 
m. 1 , 
0-62 
0-7 
0-62 
Width 
PP 
PP py • • 
0-82 
0-92 0-76 
0-6 
Length 
PP 
„ 2 . . . 
0-91 
1-16 1-0 
0-84 
Width 
P* 
PP PP • • 
1-08 
1-0 0-9 
0-7 
Length 
PP 
„ 3 . . . 
1-7 
1-9 1-6 
1-58 
Width 
Pf 
PP PP • • • 
1-21 
1-22 1-0 
0-82 
These dimensions clearly show the proportionately greater width of the molars 
of the fossil, when compared with those of the living form. As there is another 
palate specimen in the British Museum, in which the teeth are similar to those of 
the type cranium, it may be safely assumed that the dimensions given represent the 
average size of the cheek-teeth of the species. 
Mandible . — As is always the case where there are several allied species of a 
genus to deal with, there is some difficulty in assigning its proper mandible to the 
present species. Several Siwalik mandibles are figured in the “ F.A.S.” under the 
name of S. giganteus, but they will all be shown in the sequel to belong to other 
species. It may be observed that the following points occur in the upper and lower 
dentition of existing species of pigs, which may be taken as guides in associating 
fossil specimens of the upper and lower dentition : — Firstly, the pattern on the worn 
surface of the upper and lower teeth is the same in the same species ; secondly, the 
relative degree of development of the talon of the last molar is the same in the 
upper and lower jaws, although this part is actually larger in the latter ; thirdly, m. 2 
is slightly longer and considerably wider than ; and, fourthly, that where the 
