906 ROBERT COLLETT, 



The „Rat Kangaroo" does not appear to be frequent in Central 

 or Northern Queensland, and only one individual of this species was 

 in the collection. 



Colouring normal. The upper surface of tail is furnished with 

 black hairs almost from the root, and about the whole of the outer 

 half is entirely black ; beneath it is greyish brown to the tip. 



The skull. The length of the skull is 71mm, breadth 40mm. 



Waterhouse (Nat. Hist. Mamm. , vol. I, pl. 6) has published 

 several figures of the skull of this species. I shall point out one or 

 two points in which the present Queensland skull does not agree with 

 these drawings. 



The frontalia are in front slightly, but clearly inflated (a mere 

 indication of, what takes place in Bendrolagiis lumhoUzi) ^ and the 

 central portion between them is somewhat concave. 



The nasalia become greatly narrowed anteriorly, where their breadth 

 is only a little more than half that of their hinder margin. 



The teeth. 



Dentition '- i t-> ^ l-> V t-, i^ i (30) ; the milk tooth has been shed, 

 and ^ 2 is in use. 



The teeth are decidedly coarser, and the dental series longer than 

 in Waterhouse's figures, p^, which has 9 — 10 fine stripes, is long, 

 but clearly shorter than the combined bases of mi andm^. ma isa 

 little larger than m i (not the reverse, as appears from Waterhouse's 

 description 1. c. p. 218), and is considerably larger than m^. The entire 

 length of the row of teeth (to the front of the premolar) is 24 mm, or 

 exactly as long, as the space between the tubercles on the two lacrymalia. 



The Upper incisors are besides but slightly compressed ; the worn 

 surface of i 2 is even almost round. 



The palatina are perforated to the posterior margin of m ^ ; the 

 bullae osseae are very large, their greatest diameter being more 

 than the combined bases of the 3 front molars^ . 



Fam. Hypsiprymnodontidae. 

 39. Hypsiprymnodon moschatus Rams. 1876. 



Hypsipriimnodon woschatus Eams., in : Proc. Lin. Soc. New S, Wales, vol. I, 



p. '33 (1876). 

 Pleopus nudicaudatus Owen, in : Ann. Mag. Nat. Hist, 4. ser., vol. XX, 



p. 542 (1877). 



A. Herbert Vale, Dec. 1882 (incomplete skeleton with skull). 



B. Herbert Vale, 19. Nov. 1882 (skin with skull). 



