Ill 



All the permanent teeth ore in place : the bones are numbered on coloured 

 labels corresponding with the TABLE op SYNONYMS. 



Pratnted by Pro/. Owen, F.Jt.S. 



1780. The skull of a female of the Rat-tailed Potoroo (Hyptriprymntu murinut). 



Thk specimen was taken from the kin originally described by Hunter, ami figured in 

 . White's ' Journal of Voyage to New South Wale*,' p. 28, at the " Potoroo." 

 t Dental formula : 1 ?, e j, p |-|, m J=30. The molar teeth hare been worn quite 

 flat and smooth. 



Thii skull shows a longer and more tapering face, longer and narrower nasals, more slen- 

 der zygomata, and a more triangular occiput than that of the Hyptiprymntu lltmleri. 



Hunterian. 



1781. The skeleton of a mole of the Rat -tailed Potoroo (Hypsiprymniu muriniu). 



The inner condyle of the humerui is perforated. There are 7 cervical, 12 dorsal, 7 lum- 

 bar, '2 sacral, and '23 caudal vertebra:. The second to the fifth caudal inclusive bear hsem- 

 apophyte*. The transverse process of the seventh cervical is perforated by the vertebral 

 artery. The fabclke are preserved. The patcllse are not owified. The tibia and fibula 

 are distinct. 



.!/. Gould. 



1782. A partially disarticulated skeleton of a male Rat-tailed Potoroo (Hypsiprym- 

 nu inuriniui). 



The dental formula is, i ?, e ^J, p l \, m jE;=30. There are 7 cervical, 13 dorsal. 

 6 lumbar, and 2 sacral vertebra: : the caudal vertebra; are not all preserved. 



Pretexted by George Bennett, Esq., F.L.S. 



1783. The skull of a male llypxiprymnus murinu*, from Murray River, Smitji 

 Australia. Prcaentcd by Governor Sir George Grey, C.B. 



1784. The skull of a male Hyptiprymniu nmrintu. MM. Gould. 



1785. A vertically bisected skull of a male Hypsiprymnu* murintu. Mia. Gould. 



1786. The skull of a female of the same species of Potoroo. 



The canines are relatively smaller than in the male. 



Purcktued 







1787. The skull of a young female of the same species of Potoroo. 



The but true molars are nearly in place, but the two deciduous molars are retained. 

 From Mount Bryan, South Australia. 



Presented by Governor Sir George Grey, C.B. 



