SIWALIK RHINOCEROTIDiE. 
43 
skulls and other remains are figured. In that work there are figured two specimens 
of adult skulls (pi. LXXIII, fig. 1 ; pi. LXXIY, fig. 2), and one of an immature 
skull (pi. LXXIY, fig. 1), showing the milk-molar dentition. 1 In pi. LXXV, 
fig. 1 of the same work, there is figured the left upper molar dentition of a 
rhinoceros under the same specific name. An upper tooth of the molar series is 
represented in figure 4 of the same plate. Specimens of a mandible referred to 
this species are also figured, hut, as has been said in the description of the last 
species, I have not accepted this identification. A short notice of this species has 
been given in the preceding volume of this work, 2 but beyond this no important 
or original notice has ever been published. I accordingly proceed to notice briefly 
the leading characters of the more important specimens figured in the “ Fauna 
Anti qua Sivalensis” (the dentition of one of which will he noticed more fully), 
and to describe certain teeth from the collection of the Indian Museum apparently 
belonging to this species , It may he added that there are exceedingly few remains 
in the latter collection which, can he referred to this species. 
Cranium . — As far as can he judged from the figures given in the “ Fauna 
Anticjua Sivalensis/ 5 the cranium of this species indicates that it carried one very 
large nasal horn, and that the superior border was highly curved, hut to a less 
extent than in the preceding species ; it was also distinguished by its greater width 
across the frontals. A cast of the young skull, already referred to, shows that the 
inferior squamosal processes were united below the auditory meatus. Measure- 
ments of the skulls figured in the “ Fauna Antiqua Sivalensis 55 are given in the 
descriptions of the plates of that work, 3 and this is about all that can be gathered 
from the materials at our disposal. 
Upper molar dentition . — Among the crania figured in the “ Fauna Antiqua 
Sivalensis, 55 the specimen, of which the inf erior aspect is represented in figure 2 a of 
plate LXXIY, alone exhibits the greater part of the molar series in an intermediate 
condition of wear, and is accordingly the best adapted for studying the general 
characters of these teeth. 4 This specimen shows that the true molars are readily 
distinguished from those of R. sivalensis by the absence of any distinct ‘ buttress 5 
at the antero-external angle, and also by the consequently much greater flatness 
of the external surface of each tooth. The molar teeth of both species agree in the 
presence of a distinct ‘crochet, 5 and in the absence of a ‘ combing-plate. 5 Yery 
frequently, in the upper molars of R. palceindicus, the ‘crochet 5 extends completely 
across the ‘ median valley 5 so as to cut off from this valley a separate pit, which, 
when the crown is worn down, appears as a distinct island or ‘ fossette, 5 frequently 
termed the ‘ accessory fossette. 5 In this respect the true molars of R. palceindicus 
in many cases differ from those of R. sivalensis , but this does not appear to be an 
1 In the description of this figure, the specimen is erroneously said to show the permanent dentition. 
2 Page 22 et seq. 3 “ Pal. Mem.” Vol. I. 
4 It is impossible to avoid a certain repetition of the matter given in the first volume on this subject. 
