SIWALIK AND NARBADA BUNODONT SUINA. 
47—81 
greater. This specimen, therefore, indicates an animal as large as S. cristatus ; but 
other specimens scarcely exceed the size of S. anclamanensis. 
In its relatively large hinder premolars the mandible represented in plate VIII., 
fig. 3, is like that of S. porcus^ ; but pm. 3 is longer, instead of shorter, than pm. 4 in 
the fossil ; and the two preceding teeth are well developed. In the large size of the 
hinder premolars in both jaws the fossil is distinguished from S. vittatus as markedly 
as from the S. anclamanensis group. 
In plate VIII., fig. 5, there is represented a fragment of the right ramus of the 
mandible of a young pig, collected by Mr. Theobald in the Siwaliks of the Punjab, 
containing the last milk-molar (mm. 4) in a half worn condition, and m. 1 in an early 
stage of wear : from the size of the latter tooth the specimen may be referred to 
the present species. The milk-molar agrees very closely with the same tooth in a 
young English domestic pig. In fig. 6 of the same plate there is represented the 
corresponding portion of a left ramus, obtained by Mr. Theobald from the Siwaliks 
of Kushalghar, below Attock, containing the homologous teeth. The milk-molar is 
broken and very much worn : m. 1 is slightly smaller than in the last specimen, and 
indicates a small individual of the species. In fig. 8 of the same plate there is 
represented a fragment of the right ramus of the mandible of an extremely young 
individual, also from the Siwaliks of the Punjab, containing the third and fourth 
milk-molars in an unworn condition. The dimensions of the teeth of the three 
specimens described above (taken in the same order) are given in the following table, 
viz .'. — 
Length of mm. 3 0’46 
,,,,,, 4 0-68 0-72 
Width ,,,,,, 0-34 0-32 0-36 
Length ,, m. 1 0-61 0'58 
Width ,,,,,, 0'44 0-41 
Specific distinctness and affinities. — The foregoing comparisons indicate that the 
present form is specifically distinct from any existing pig, and that it appears to be 
most nearly allied to the S. anclamanensis group ; but is distinguished from the living- 
representatives of that group, among other characters, by the proportionately larger 
and stouter premolars, and the wider and lower-crowned molars of the male sex ; 
most individuals of which were of larger size than the existing species. In the form 
of the premolars it shows some affinity to the African river-hogs. 
Turning to the previously described Siwalik species, the present form is at once 
sufficiently distinguished from 8 . falconeri by its much simpler last molars. In the 
structure of its cheek-teeth it is much nearer to 8 . titan, but is sufficiently 
distinguished by its greatly inferior size. The last upper molar (pi. VIII., fig. 10) is 
of the same general form as that of 8. titan (pi. VII., fig. 6), but the hinder part of the 
talon {h) is narrower, the valleys are less open, the accessory columns in the 
neighbourhood of the talon more numerous, and the enamel thrown into a greater 
number of corrugations. The lower molars of the two are likewise very si mi lar 
1 Vide Eiitimeyer, op. oil. 
M 
