﻿256 ALLEN'S naturalist's LIBRARY. 



An imperfectly known species nearly related to M. robustus, 

 but distinguished from it, as well as from M. altus, by the 

 much slighter downward inclination of the upper border of the 

 lower jaw in front of the premolar teeth. 



Distritiution. — Queensland. « 



V. MACROPUS BREHUS. 



Stheniirus brehus^ Owen, Phil. Trans., 1874, p. 272. 

 P7-otemnodo?i 7?ii?nas, Owen, op. cit , p. 278. 

 Macropus b?-eh2is, Lydekker, Cat. Foss. Mamm., pt. v., p. 207 

 (18S7). 



Characters. — This and the three remaining extinct species of 

 the genus belong to the group of larger Wallabies, as defined 

 on p. 14, although they vastly exceed all the existing species 

 of that group in point of size, being, indeed, superior in this 

 respect to the largest living Kangaroos. In all of them the 

 last premolar is characterised by its great longitudinal length, 

 as well as by the vertical flutings on the sides of its sharp and 

 trenchant crown. The upper molars have no longitudinal 

 bridge connecting the anterior basal ledge with the first trans- 

 verse ridge ; and in both jaws the molars are relatively wide, 

 and have a low longitudinal bridge connecting the two trans- 

 verse ridges. 



By Garrod these gigantic extinct Wallabies were regarded as 

 allied to the Kangaroos of the genus Dorcopsis, which they re- 

 semble in the length and general form of the last premolar. 

 The elongation of the latter tooth is, however, not so great as 

 in that genus, from which these Wallabies are further distin- 

 guished by the presence of the longitudinal bridge connecting 

 the transverse ridges of their molars, by the large size of the 

 innermost pair of upper incisor teeth, and by the total absence 

 of the upper canine. 



