SIWALIK RHINOCEROTHm 
7 
Rhinoceros camus, H. Smith. 
,, oswelli, Gray. 
26. ? Rhinoceros sinensis (Owen). Pliocene (?) ; China. 
27. Rhinoceros siyalensis (Pale, and Caut.). Plio-miocene ; India. 
Rhinoceros indicus fossilis, Baker and Durand. 
,, unicornis, Brandt. 
Zalabis sivalensis, Cope. 
? Rhinoceros angustirictus, Falc. and Caut. 
28. Rhinoceros sumatrensis (Cuvier). Recent; S. E. Asia. 
Ceratorhinus blythi, Gray. 
„ crossi, Gray. 
„ niger, Gray. 
„ sumatranus, Cope. 
„ sumatrensis , Gray. 
Rhinoceros crossi, Gray. 
„ sumatranus, Raffles. 
29. Rhinoceros tichorhinus (Cuvier and Pischer). Up. pleistocene; Europe. 
Atelodus antiquitatis, Brandt. 
,, tichorinus, Pomel. 
Ccelodonta antiquitatis, Cope. 
„ pallasi, Gray. 
Rhinoceros antiquitatis, Blumenbach. 
„ jourdani, Lartet and Chantre : teste Brandt. 
,, lenensis, Pallas. 
,, mesotropus, Aymard, in part, teste Falconer. 
„ primigenius, Broun. 
Dentition of the Rhinocerotidoe. — It will be unnecessary on this occasion to 
enter at length into the consideration of the dental system of the Rhinocerotidoe, of 
which only the two genera, Rhinoceros and Acerotherium , need be mentioned at all. 
The main features of the number and general characters of the teeth of these 
genera will he found given in the “ Odontography ” of Professor Owen ; while cer- 
tain points in relation to the homology of some of the teeth will he found mentioned 
in a paper by the author. 1 
It will suffice on this occasion to state that in the upper jaw the rhinoceroses 
above alluded to may, in the permanent dentition, have either one or two pairs of 
incisors, or may be destitute of any ; while there are never any canines. The per- 
manent upper molar series consists of seven teeth, of which the three last are true 
molars ; while of the anterior four, the first may be a milk-molar and the other 
three premolars, or all four may be premolars. Pour milk-molars are always 
developed. 
In the lower jaw there may be no permanent teeth in advance of the premolars, 
or there may be either one or two pairs of such teeth, in which case the central pair 
1 Jour. As. Soc., Bengal, Vol. XLIX, pt. II, p. 135. 
