SIWALIK AND NARBADA BUNODONT SUINA. 
25—59 
S. erymanthim than in that named N. major. In N. antiquusj which is apparently only 
known by the mandible, the length of mTS is less than the united lengths of the two 
preceding teeth, and it is, therefore, to be presumed that the same relation held good 
in the upper jaw: the lower molars are of the elongated form of those of S. 
erymantliiiis. The hinder lower premolars of B. antiquus are quite different from those 
of the mandible figured in plate XI.; and it is probable, as will be shown under the 
head of the next species, that the canine was relatively smaller. 8. provincialis^ is 
of smaller size, and is readily distinguished by the extreme smallness of the talon of 
m. : in the lower jaw the united length of m. i and m72 exceeds that of m. 3, and 
the last premolars are not of the peculiar form of those figured in plate XI. The 
molars of 8. clicerotherimif are frequently of much smaller size, and the columns are 
of more simple structure. 
It thus appears, irrespective of the question whether the mandible be rightly 
associated with the crania, that the present large Siwalik pig cannot be identified 
with any other named form, and is, therefore, entitled to specific distinction. ITe 
remarkable resemblance existing between its cranium and that of the Javan 8. 
vittatus., coupled with the fact that the talon of the last molar of the latter is rather 
less complex than in 8. cristahis, and that, according to Prof. Rtitimeyer, its molars 
are relatively wider, and its hinder premolars decidedly stouter than in 8. se7^ofa, 
renders it not improbable that the Javan species may be the lineal descendant of the 
larger Siwalik species. The existing species has lost the wide pm. 3 characteristic of 
the latter ; as well as, if the fossil mandible be rightly determined, the large and 
wide last lower premolars. Force is added to this suggestion from the circumstance 
that other Siwalik mammals find their existing representatives in the Malayan 
region : thus Ilemihos is represented by the living anoa of Celebes, P alceopitliecus by 
the orangs of Borneo, and Rhinoceros sivalensis by the small one-horned rhinoceros of 
Java and the eastern side of the Indian region. 
The cheek-dentition of the mandible figured in plate XI. indicates very clearly 
that the species of 8us to which it belonged was intimately related to Tetraconodon ; 
and that the two had a common origin at a comparatively recent geological epoch. 
DisRibiiUon . — If the specimens described above be rightly associated, the range 
of the present species extended from the typical Siwalik Hills to the Punjab.^ 
Species 2 : Sus titan, n. sp., nohis. 
History . — The name of this species is mentioned here for the first time ; the 
specimens on which it is founded having been hitherto referred to the last species.® 
1 Kaup, “ Beitriig'e,” pt. IV., pis. IV., V. 
2 Gervais, “ Zool. et Pal. Fraii 9 .,” 2nd ed., pi. III., figs. 1-6, pi. XXII., fig-. 8. 
3 Blainville, “ Osteographie,” Genus Sus, pi. IX. 
4 It has been elsewhere stated that the species occurs in the Narhadas : the mandible on which that statement rests 
belongs, however, to another species. 
5 On page 81 of the Xth volume of the ‘Records’ a portion of the left maxilla of a large hunodont artiodactyle was 
described by the present writer under the name of U ippopotamodon sivalense. It contains two teeth which were assumed to he 
and np_3. Subsequent examination has shown that the specimen really belongs to the present species of m. .s being 
absent by an abnormality : the teeth at first regarded as m- 2 and m. 3 are really m. 1 and m- 2 . The specimen is now in the 
Indian Museum (No. B. 7). 
