HYRAXES, ELEPHANTS, AND UNGULATES 301 



dentition. Two or perhaps three distinct species of this 

 genus have been generally recognized, but the recent 

 researches of Dr. Forsyth Major (cf. P. Z. S. 1897, p. 359) 

 tend to show that we are by no means yet well acquainted 

 with the species of this difficult group. The third genus 

 of SvAdas, the Babirussa, remarkable for the peculiar shape 

 of its four tusks, exists only in the far-away island of 

 Celebes and (perhaps introduced) in the adjacent island of 

 Bouru. It must, therefore, be attributed to the Oriental 

 Region, to which, we believe, we have now definitely shown 

 (see above, p. 146) that Celebes must be referred. 



The fourth and last family of Swine-like Ungulates con- 

 tains only the Peccaries (Dicotyles) of the New World. The 

 two species belonging to this genus range from Texas and 

 the Southern United States down to Patagonia ; and must 

 be regarded as purely Neotropical in their geographical 

 classification, although one of the species — the Collared 

 Peccary — undoubtedly intrudes slightly within the boun- 

 daries of the Nearctic Reo-ion. 



