Cei'tain Nciv Species of Marsupials. 9 



longer dark hairs. General colour a mouse grey suffused on the 

 dorsal surface with rufous. The sides, under surface of the body 

 and head, and upper surface of the hands and feet, white. Ears 

 large, when laid forward they reach considerably beyond the 

 eye. 



Palms naked, gi'anulated. 



Tail much longer than the head and body. Very stout in its 

 proximal part, and strongly incrassated. Very much stouter, 

 longer and more incrassated than in S. crassicaudata. Tapering 

 to a long thin end. Strongly scaled at the pi-oximal end with 

 short hairs not hiding the scales. Distally the hairs are more 

 numei'ous and somewhat longer toward the tip. 



T. ,.,. . 1.2.3.4 1 , 1.0.3.4 1.2.3.4 



Dentition /. . c. -. p.m. — ^— v— • c. . 



1.2.3 1 ^ 1.0.3.4 1.2.3.4 



Teeth as usual in the genus. Canines small and the pre- 

 molars increasing in size backwards. 



Dimensions op Adult Male (in al.). 



Habitat. — Central Australia, Charlotte Waters. Terrestrial. 



The characteristic features of this form are (1) the remarkably 

 long, very stout, and strongly-incrassated tail, and (2) the 

 I'elative length of the foot as compared with S. crassicaudata or 

 inurina. 



There is no difficulty in distinguishing it from the former, the 

 specific name of which might with greater appropriateness have 

 been applied to this species. I have some twenty adult specimens 

 of crassicaudata from the same district, all agreeing closely with 

 one another in relative dimensions, and markedly distinct from 

 the species in question. 



The specific name is adapted from the native name of the 

 Finke River — the Larapinta — in which district it is found. 



For the specimen upon which the species is founded I am 

 indebted to Mr. P. M. Byrne. 



