22 INDIAN TERTIARY AND POST-TERTIARY YERTEBRATA. 
tapiroid and palseotheroid types, such, as Hyracodon, Palceotherium, etc. The 
same want is shown in the absence of the ‘crochet’ in the earlier premolars. 
The absence of any distinct * combing-plate ’ indicates affinity with the species of 
rhinoceros having a molar dentition constructed on the type of that of the Sumatran 
rhinoceros, a less complex type than that occurring in the tichorhine and Indian 
rhinoceroses. 
Palate from Perim Island.^- Since the above descriptions were written, another 
specimen of the upper dentition of this species has come under the author’s notice. 
The specimen belongs to the museum of the Bombay Branch of the Royal Asiatic 
Society, and has been already alluded to in another publication of the Survey. 1 It 
was obtained from the Siwaliks of Perim Island in the gulf of Cambay. By the 
courtesy of the Council of the above mentioned Society, the specimen has been tem- 
porarily lent to the Indian Museum, with permission to describe and figure ; and 
accordingly a figure of the molar dentition of the right side has been intercalated 
among the plates accompanying this memoir (pi. II A.). 
The specimen, which bears numerous recent bivalves on its surface testifying 
to its place of origin, comprises the greater portion of the palate, exhibiting on the 
right side all the molar series, with the exception of the first tooth ; and on the left, 
the three true molars only. The molar series of the right side, being the more 
complete, has been selected for illustration. In the figured series, the first true 
molar has been considerably damaged, but the remaining five teeth are in a fair 
state of preservation. A comparison of the additional plate with plate II will at 
once show that the two series of teeth belong to the same species. The Perim 
specimen is, however, important from the fact that in all the teeth the ‘ cingulum ’ 
is much less developed than in the Punjab specimen. A similar variation has already 
been noticed in the case of isolated teeth of the species. The Perim specimen is 
further important, in that it shows the complete last true molar, but slightly worn, — 
a tooth lacking in the Punjab specimen. 
The dimensions of the Perim specimen are as follows : — 
Width of palate between last true molars 
„ „ 1st 
Length of three true molars 
„ of molar series (five teeth) 
„ of 2nd premolar . 
Width of „ „ ... 
„ of 3rd „ ... 
Length of 4th „ ... 
Width of „ „ ... 
Length of 1st true molar . 
Width of „ „ ... 
Length of 2nd „ ... 
Width of „ „ ... 
Length of 3rd „ ... 
Width of „ „ ... 
52 
4-32 
7-8 
13-2 
2- 05 
2 09 
28 
2-2 
3- 3 
3-1 
3-4 
31 
3-4 
2-09 
32 
E. G. S. I.,Vol.XrV., p. 150, 
