82—48 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
(pi. VIII., fig. 3, and pi. VII., fig. 4), but it is difficult to compare them exactly, 
owing to their different degrees of wear. The talon of m. 3 of the present form 
seems to have had lower columns, less distinctly separated from one another, than in 
S. titan. In no individuals of the latter w^ere tlie hinder lower premolars relatively 
as narrow as in some (female) individuals of the present form. From N. giganteiis the 
present form is equally well distinguished by its inferior size. The last upper molar 
of that species (pi. XI., fig. 2) has no sign of the cingulum Avhich is so conspicuously 
developed in the corresponding tooth of the present form ; and the first and second 
molars are usually still Avider in proportion to their length. Finally the teeth of the 
loAver jaAv provisionally assigned to that species (pi. XI., fig. 1) are of a totally 
different type from those of the present form. 
It may accordingly be taken as pretty evident that the present form is specific- 
ally distinct from either of the three species of SiAvalik pigs already described, and 
it now remains to compare it wdth the fossil species of Europe. It will probably 
suffice to state that the forms coming nearest to the SiAvalik fossil are those grouped 
in the table on pp. 51-2 under the names of S. chceroides.^ S. lochharti, and N. 
'palceoclmrus. The lower jaAv figured by, Kaup( under the latter name in having 
relati\^ely large premolars is A^ery similar to the specimen rejDresented in ]3late VIII., 
fig. 3 : its m. i and m. 2 are, however, rather more elongated, but as this character is not 
constant in the specimens referred to the present species it cannot be regarded as of 
specific value. The last upper molar of the same species figured by Kaup^ is also 
A’ery similar to the corresponding tooth of the specimen in plate VIII., fig. 10, 
although its talon is placed directly in the median line. The above-mentioned 
specimens come nearer to the Siwalik form than any others which have come under 
the present writer’s notice ; and the resemblance is indeed so close that it appears 
quite possible that the tAVO may be specifically identical. Bearing in mind, hoAvever, 
the extreme difficulty of distinguishing allied species of the genus from the characters 
of their molars, it Avould be rash to say that the European and Indian forms are the 
same ; and it, therefore, seems best that the name of S. ligmdricu^ should be, at least 
provisionally, retained for the latter. 
Distribution. — Remains referable to 8. hgsudricus have been obtained from the 
typical SiAvalik Hills, from the SiAvaliks of the Punjab and Perim Island, and from 
the\lower Swaliks of Sind. I’lie latter circumstance is of importance, since it is 
from the western side of India that sj^ecies closely connected Avith European forms 
usually occur. 
Species 5 : Sus punjabiensis, nobis. 
History. — In 1878 the present AvriteP gave a preliminary description of a 
fragment of the mandible^ of a small Siwalik pig, which was referred to a new 
species under the above name. 
1 “Beitriige,” pt. IV., pi. A''!., figs. 1, la. 2 Ibid, fig. 2. 
3 The name S. palxochcertis was published in 1833, and S. hysudriciis in 1847. 4 ‘ Records,’ vol. XI., p. 81. 
5 In the original notice two specimens are mentioned ; the second (pi. VIII , fig. 6) belongs, however, to a young 
individual of 5. hysudricus. 
