34 
MOLAR TEETH AND OTHER REMAINS OE MAMMALIA. 
A figure of an unworn left molar of this species is given in the “ Eauna 
Antiqua Sivalensis ” {Flate 75, Fig. 15) from Perim Island. 
The molar and premolar teeth of a right maxilla of Rhinoceros brought from 
Ava by Mr. Clift and figured in the Transactions of the Geological Society of London 
{Second Series, Vol. II, Plate 5) belong to the present species. Clift’s figure is 
copied in Dr. Blainville’s Osteography {Atlas, Vol. Ill, Plate 14). On the same 
plate there is another figure of an upper molar of the right side, also from Burma, 
belonging to the same species. 
This species had therefore a very wide distribution, having been obtained from 
Burma, from the Sub-Himalayan Siwaliks and from Perim Island. 
On comparing the above specimens with the upper molars of Acerotherium 
incisimm of Kaup,, the general form of the two, though sufficiently different for 
specific distinction, is very similar, evidently belonging to the same type, and 
leaving no doubt in my mind that the Indian specimens are rightly placed in the 
sub-genus. In both species we note the excess of the transverse over the antero- 
posterior diameter of the crown (carried to the greatest extent in the Indian species), 
the wavy cingulum, surrounding the inner half of the tooth; the simple valley 
and single crochet ; the direction of the median valley is the same in both species. 
The European species is distinguished by an antecrochet, nearly blocking the median 
valley on the inner side of the crochet. 
The presence of Acerotherium among the Indian Tertian Rhinocerotes is 
another link connecting the faunas of early India and Miocene Europe ; in the 
presence of the cingulum, and the simple form of the crowns of the molars, 
Acerotherium is a connecting link between the true Rhinocerotes and the 
Palceotheria. 
Including the above new species and the living forms, we have the following 
large list of species of Rhinoceros (or its sub-genera), which have been described, 
from South-Eastern Asia ; some of the modern species are, however, probably 
only varieties : — 
a. nasalis, Gray. 
R. indicus. 
R. javanicus. 
R. sumatrensis, 
R. stenocephalus , Gray. 
R. sivalensis, Falc. 
R. palmndicus, Falc. 
li. platgrhimis, Falc. 
In addition to these there seems to be evidence of another species from Burma, 
another from Attock, and a third from Sind. The fossil Rhinocerotes of Asia there- 
fore vie with the Prohoscidia in the number of species. In the above list nine of 
the species are extinct, while the total number of living forms is only six. It must 
( 52 ) 
R. niger, Gray. 
R. namadious, Falc. et nobis. 
R. planidens, nobis. 
R. sinensis, Owen. 
R. deccanensis, Foote. 
R. {A) perimensis, Falc. 
U. iravadicus, nobis. 
