1!^)8 On neir ^[ummaIs from N. Australia. 



Peradorcas concinna canescens, subsp. n. 



Essential characters as in true concinna, but instead of the 

 pjround-colour being rich rusty, scarcely modified by the 

 longer gveyish-white hairs, it is a dull rufous, ht avily over- 

 laid, in fact practically hidden, by the broad greyish sub- 

 terminal bands and blackif-h tips of tlie longer hairs. The 

 general colour is therefore a grizzled Beitongiu-Vilie tone, 

 quite unlike that of true concinna. Crown greyish brown. 

 Arms and legs greyish, with scarcely a tinge of bufFy. 

 Behind the shoulder a dark patch, succeeded by a lighter 

 one, and a light hip-mark; all more prominent tlian in 

 concinna^ though even in that animal there is an indication 

 of these markings, which are usual in the Petrogale group. 



Skull rather smaller than in the available examples of 

 concinna, but Avhether this is due to age is not at present 

 clear. 



Dimensions of the type : — 



Head and body (c.) 400 mm. ; tail 325 ; hind foot 101 ; 

 ear 41. 



Skull : basal length 64 ; greatest breadth 42*5. 



Hub. Arnhem Land, N. Territory, Type from Nellie 

 Creek. Other specimens from Mary R. [DuM). 



Type. Adult male. B.M. no. 4. 1. 3. 58. Original number 

 1164. Collected 13 February, 1903, by J. T. Tunney. 

 Presented by the Hon. W. Eothschild. 



The Arnhem-Land specimens of Peradorcas have been 

 referred by Dr. Collett* and myself j to P. concinna, of 

 which the type specimen, collected on the "N.AV. Coast of 

 Australia " by Lieuf. Emery, is in the British Museum. 

 This type is in a very faded condition, and it is only now, 

 on the receipt of a fresh example from near Wyndham, 

 Kimberley, collected by Mr. J. P. Rogers, that I am able to 

 verify that the colour of concinna is really ferruginous, as 

 stated by Gould and Waterhouse, and that the much greyer 

 Arnhem-Land animal is a different form. 



It may be noted that this fresh specimen of concinna, 

 although very old, with the incisors worn down, is still 

 continuing to produce additional molars at the back of its 

 tooth-row, a characteristic pointed out when I fou;ided the 

 genus Peradorcas. 



* P. Z. S. 1897, p. 325. 



t Kov. Zool. xi. p. 226 (1904). 



