PART 1.} 
Lydekher ; Notices of Siwalik Mammals. 
75 
One other tooth remains to be mentioned : this specimen is a small upper molar 
of a Stegodon, which from its carrpng four ridges only, and from its size, must bo 
a second milk-molar; the length of this tooth is ‘2'2 inches, and its width 1'4inch. 
It cannot belong to S. insignis and S. ganesa, since the second milk-molar of those 
species has five or six ridges (F. A. S., Plate XIX, fig. I) ; neither can it belong 
to 8. sinensis, since it is much smaller than the homologous tooth of that species 
figured by Professor Owen, and diSers from that .specimen in having no anterior 
talon, and in having straight ridges. 
It may belong to S. cliftii or S. iomhifrons ; if it belong to the former, it con¬ 
clusively proves that tooth h cannot be the third milk-molar of that species, 
as the latter would be far too large to have immediately followed it. If this 
second milk-molar belong to S. homhifrons, as I think probable, it most con¬ 
clusively proves that the homologous Chinese tooth cannot belong to that species. 
The inference from the above would be that there existed a fifth species of 
Stegodon in the Siwaliks, which is the same as »S'. sinensis of Owen; and also that 
both that species and S. homhifrons had a low ridge formula, which shews that 
they are closely connected with the Mastodons and S. cliftii. Professor Owen at 
page 420 of his notice of the Chinese Stegodon suggests that the two imperfect 
hinder molars, represented in figures 5 and 6 of Plate XXIX A of the F. A. S., 
which were considered latterly by Falconer to differ from the named species, 
belong also to S. sineyisis. The discovery of a tooth in the Siwaliks, which 
corresponds with the Chinese specimen of that species, confirms that suggestion ; 
I shall hope on a subsequent occasion to be able to present fuller details of the 
dentition of S. homhifrons and 8. sinensis. 
Genus: Dixotheeicm. 
Of this genus Mr. Blanford has obtained from Sind a very beautiful specimen 
of a ramus of the mandible, containing the four la.st teeth in perfect preservation ; 
several detached teeth have also been obtained from Sind, as well as a single 
milk-molar from Kushalghar. AU the specimens seem to belong to D. peiitapotarmce; 
the small size of the new specimen of the mandible quite con fir ms the distinctne.ss 
of the latter species from D, indicurn. 
With the addition of the above-mentioned species, two of which are new to 
the Sub-Himalayan Siwaliks, the Proboscidian Fauna of the Siwaliks of the 
Western Punjab is the largest yet known in any one area; it comprehends the 
following species, all of which are represented in the collection of the Indian 
Museum:— 
Dinotherium pentapotaraiae, nobis. 
Mastodon ( Trilophodon) falconeri, nobis. 
Mastodon (Tetralophodoii) latidens, Clift. 
Mastodon (TetralopTiodon) perimensis. Falconer. 
MastO'lon (^Pentalophodwi) sivalensis, Falconer. 
Stegodon cliftii, Falconer. 
Stegodon homhifrons. Falconer. 
Stegodoyi sinensis, Owen. 
