208 . MAESUPIALTA. 



associated with the cranium No. 47832 shows, however, an absolute 

 identity with those described under the latter name \ 



The estimated length of the entire cranium is about one foot; the 

 length of the upper series of cheek-teeth usually varying from 0,083 

 to 0,087, and that of the lower jaw from 0,080 to 0,083 ; but a 

 larger series of specimens would probably show a more extensive 

 variation in this respect. In this and the following three species, 

 the upper true molars have no bridge connecting their anterior talon 

 with the first ridge ; the molars of both jaws are comparatively 

 wide, and have a low longitudinal bridge between the ridges. In 

 the present and largest species, the length of the last premolar con- 

 siderably exceeds that of the first true molar ; the lower true molars 

 of the type form have a distinct hind talon ; and the first upper 

 incisor is much larger than either of the others. 



There is considerable variation in the length of pm. 4 in the speci- 

 mens referred by Owen ^ to this species, and it is probable that some 

 of the examples in which that tooth is unusually elongated are iden- 

 tical with the next form. 



The species appears allied to existing "Wallabies like M. ualahatus, 

 in which the last premolar is relatively long. The present form and 

 its allies were regarded by Garrod ^ as showing affinity to Dorcopsis ; 

 but they differ by the shorter pm. 4, the distinct longitudinal bridge 

 between the ridges of the true molars, the large i^, and the absence 

 of the upper canine. 



Hah. New South Wales and Queensland. 



44121. The imperfect palatal region of the cranium, showing all the 

 (Fig.) dentition except the last three true molars of the left side ; 

 from the Pleistocene of Clifton, Queensland. Figured by 

 Owen in the ' Phil. Trans.' 1876, pi. xxviii. figs. 1-3, and 

 also in the ' Extinct Mammals of Australia,' pi. cviii. 

 figs. 1-3. Presented by G. F. Bennett, Esq., 1873. 



47832. The imperfect palatal region of the crarjium and the asso- 

 {Fig.) ciated anterior extremity of the mandible ; from Clifton. 

 These specimens, which are in a somewhat crushed con- 

 dition, and belonged to an old and probably male individual, 



1 Tlie imperfect cranium figured from a photograph by Owen in the * Extinct 

 Mammals of AustraHa,' pi. Ixxxvii. figs. 1-4, under the name of Trotemnodon 

 mimas presonls no characters by wliich it can be distinguished from tliat -of 

 M. hrehas; the alleged simpler stniclui'e of P"^- ■* being due eitlier to the im- 

 perfection of the specimen or t;j want of clearness in the photograph. 



2 ' Extinct Mammals of Australia,' pi. cix. 



3 Proc. Zool. Soc. 1H75, p. 27^. 



