1876.] 



DENTAL CHARACTERS OF RHINOCEROSES. 



44/ 



the smaller size of the incisor teeth *, this species occupies a some- 

 what intermediate position between the one-horned Asiatic and the 

 African species. 



Fig. 4. 



Under surface of binder part of the skull of Bkinoceros sondaicus. One third 



natural size. 



pf, pterygoid processes ; vo, hinder end of vomer ; c 2 , crochet or posterior 



combing-plate. 



R. unicornis and R. sondaicus, being otherwise more nearly 

 allied must be separated by less decisive, though by no means less 

 constant and scarcely less recognizable characters. 



* And, it may be added, the tendency to the loss of the lateral and the con- 

 stant absence of the central lower incisors, which are present in all the specimens 

 of B. unicornis and B. sondaicus examined, with the exception of one aged 

 individual of the latter, 



30* 



