ROBERT COLLETT, 



custom, when running, of keeping one arm hanging down as if it were 

 broken. 



The specimen, a young female, does not dififer in any respect from 

 specimens from New South Wales. In the distal quarter of the upper 

 surface of the tail the hair is brushlike , and attain a length of from 

 15 to 25 mm. The colour of this brush is black ; in specimens 

 from South Australia (in the University Museum at Christiania) the 

 hair is much shorter, and mixed with grey. 



The length of the body in the mounted specimen is about 440 mm, 

 the tail 375 mm. 



The skull. 



Length 84 mm, breadth 44 mm, length of lower jaw 59 mm. 



The skull resembles, in the shape of the interparietal and palatine 

 bones, the narrow snout, etc., the skull of Petrogale, but has larger 

 auditory bullae and a different dentition. 



The interparietal bone is large and distinct; the frontal crests 

 are low and rounded, and reach the interparietal bone without meeting ; 

 the area between the crests is more or less concave posteriorly. 



The nasalia are much narrower in front, than behind, and the 

 snout is therefore slender and pointed. 



The foramina palatina are extremely large and open, and the 

 palatine bones in consequence very small. The openings extend for- 

 wards to the hinder margin of the 2""* premolar; their back limits 

 cannot be determined in any of the specimens preserved in the Uni- 

 versity Museum, as there is no trace of any bony bridge behind; if 

 such has been present, it has been as slender as a hair (as in Petro- 

 gale penicillata). 



The bullae osseae are large as in Lagorchestes. 



The teeth. The dentition is (as in Hypsiprymnus) remarkable, 

 because although the specimen is almost fully grown {m * in each jaw 

 is just rising above the alveolus), i?Ms, however, still present, and 

 the milk premolar at the same time in use, whilst p ^ is not yet de- 

 veloped. 



The dental formula is therefore almost complete: 

 ih c^p ^m^ (32). 



In the Upper jaw the two outer incisors are slender; i ^ has about 

 the same size as i*, and is supplied with a groove. 



Rudimentary sockets for the canines. Both premolars are present 

 {p^ and the milk premolar), both much worn. Th first premolar is 



