On a CoUectioii of Mammals froin Central and Nortliern Queensland. }^73 



the molars the innermost is almost triangulär, and terminates behind 

 in a narrow angulated portion. m ^ in the largest of all the molars. 



Comparison with P. obesula (Shaw). When compared 

 with P. obesula ^), the dijdference is chiefly as follows. 



The colour in P. obesula is a darker greyish brown, and the light 

 tips of the hairs are reddish grey without the yellowish red hue, as 

 in P. macrura. 



The claws are dark horny-coloured. The feet are brownish grey, 

 with numerous black hairs, whilst in P. macrura they are light red- 

 dish grey without any black mixture. 



The skull in P. macrura has a longer snout, than in P. obesula, 

 and the interorbital space is more contracted. In the latter species 

 the interorbital space is thus about equal to the bases of the 4 mo- 

 lars, in the former only of 2^ molars. 



Furthermore the foramina palatina in P. obesula extend forwards 

 to (or almost to) the anterior margin of the last premolar, in P. ma- 

 crura only to the posterior margin of this tooth. Besides this the 

 first species has a second pair of foramina on the palatine part of 

 the maxillary (in length about the same as the foramen incisivum, but 

 broader), situated between the canines and the posterior margin of 

 jp ^ (or centre of j) '^). This pair of foramina are wanting in P. ma- 

 crura. 



Finally the innermost upper molar in P. macrura is contracted 

 at the back in a sharp angle, so that the base of the tooth is almost 

 triangulär, and its length considerably more than its breadth. In P. 

 obesula this tooth is almost circular, and its length is less than its 

 breadth. 



On the whole, when the dentition of the two said species is com- 

 pared, the dental series in P. obesula (on account of the longer snout) 

 is proportionally longer, and the teeth coarser. In two specimens of 

 about an equal size of both species, which I had the opportunity of 

 examining at the British Museum in October 1886, the length of the 

 dental series in the upper jaw was thus : 



P. obesula, length of skull 73 mm 



Length of dental series 37 „ 



P. macrura, length of skull 71 „ 



Length of dental series 42 „ 



1) Of which the University Museum possesses 3 specimens from New 

 South Wales, 



