OCR Text |
Show 1876.] DENTAL CHARACTERS OF RHINOCEROSES. 447 the smaller size of the incisor teeth *, this species occupies a somewhat intermediate position between the one-horned Asiatic and the African species. Fig. 4. Under surface of hinder part of the skull of Rhinoceros sondaicus. One third natural size. pt, pterygoid processes ; vo, hinder end of vomer; c2, 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 m a y be added, the tendency to the loss of the lateral and the constant absence of the central lower incisors, which are present in all the specimens of R. unicornis and R. sondaicus examined, with the exception of one aged individual of the latter. 30* |