102—68 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
character, judging from tlie cast, seems to obtain in the Lyons specimen. Tlie most 
distinctive character of the Indian teeth is, however, tlie relatively larger talon of 
3 (tig. 15a), which forms a wide flat ledge, almost entirely wanting in the Lyons 
specimen. No other distinctions can be detected between the Indian and European 
molars. 
Inciso7 \ — The first upper incisor (fig. 14) is very similar to an homologous tooth 
of Jy. splendens in the British Museum, and also closely resembles the same tooth in 
Ilyotlierium : it is much longer antero-posteriorly than of Bus. On the inner side 
of this tooth there is a small ledge or cingulum. 
Distinctness and affinities . — The foregoing comparisons indicate that the Indian 
and European forms of Listriodon are very closely allied : without additional remains 
of the former it is, however, impossible to say whether the distinctive points noticed 
above are of sj^ecific value or not; although it is probable that they are. For the 
present at least the Indian species may retain the specific name of L. yentaiootamice. 
Distribution . — The specimens described above are all the known remains of the 
species, and, as already mentioned, were all obtained from the Siwaliks of the 
Punjab. 
Species 2 : Listriodon theobaldi, nobis. 
History . — The only jirevious notice of this provisional species is a preliminary 
one in the “ Records ” for 1878,' referring to the one molar on which it is founded. 
Djjper molar . — The above-mentioned tooth, which is the only specimen known, 
was obtained by Mr. Theobald from the Siwaliks of the village of Jabi, in the 
Punjab, and is represented in plate VIII., fig. 12. From the width of its crown this 
molar seems to belong to the ujiper jaw, and is of the right side: it is in an early 
condition of wear, and, if belonging to the permanent series, is either m. 1 or m. 2 . 
The tooth differs from the molars of L. pentapotamiai by its greatly inferior size, and 
by the transverse valley being wider and more open, as well as by the absence of 
the oblique ridges running from the fore-and-aft cingula to the summits of the two 
main ridges. 
Assuming this tooth to belong to the permanent series, its greatly inferior size 
would leave no reasonable doubt of its being specifically distinct from L. pentapotamice 
and D. splendens. There is, however, no certain reason why this tooth should not be 
the last upper milk-molar (which in the pigs has the same form as the permanent 
molars), in which case it might at first sight be regarded as belonging to L. 
pentapotamke. In the pigs, however, no difference in structure can be detected 
between mm. 4 and m. 1 , and the difference in the size of those teeth is considerably 
less than that between the specimen under consideration and the first molar of L. 
pentapotamioi represented in plate VIII., fig. 13. On these grounds it is unlikely that 
the jiresent specimen is mm. 4 of that species ; and it is accordingly probable that it 
indicates a second Siwalik species of Listriodon, which may retain the provisional 
name of L. theobaldi. 
1 Vol. XI., p. 98. 
