48 ONYCHOGALE. 



3. ONYCHOGALE UNGUIFERA, Gould, sp. (1840). 

 Nail-tailed Wallaby. 



Size large ; form light and slender. Rhinariuin broad, partially 

 hairy, the hair extending downwards barely to the level of the 

 lower edge of the nostril. Fur thick, close, and rather short. 

 General color above rich sandy fawn, with a median darker band 

 of varying intensity on the back and rump ; below white. Ears 

 thinly clothed with white hairs. An indistinct white mark behind 

 the elbow. White hip-stripe present. Arms, hands, feet and 

 fromt of legs white ; back of legs fawn color. Tail very long, 

 white above, sandy-gray below ; the terminal third with brown 

 rings which gradually darken posteriorly, and finally coalesce with 

 the black tail tip, the black hairs forming a crest on the upper 

 side, and a well marked pencil at the tip ; terminal nail large and 

 flattened laterally, hidden by the black pencil. Canines present, 

 perhaps to some extent functional. 



Dimensions. Head and body about twenty-six inches ; tail 

 about the same length. 



Habitat. North-western and northern Central Australia. 



References. Thomas, B.M. Catal. p. 74, pis. ix. fig. 10 (upper 

 front teeth), xi. figs. 5 frhinarium), 6 (nail of tail); Gould, Mamm. 

 Austr. ii. pis. Hi., liii. 



Genus X. PETROGALE, Gray (1837). 



Rhinarium naked. Fur on back of neck directed downwards. 

 Central hind claws very short. Tail long, cylindrical, thickly 

 haired, its extremity pencilled. No canines. 



n .... T 1.2.3 n T> 0.0.3.4 TV,- 1.2.3.4 o qo 



Dentition. 1. ^ C. - Q , P. 5 ^ 1> M. j-^ x 2 = 32. 



Habits. -Terrestrial ; herbivorous. 



1. PETROGALE CONCINNA, #01^(1842). 



Little Rock- Wallaby. 



Size small ; form slender. Fur short, soft, and silky. General 

 color above rich orange rufous ; below white or grayish-white. 

 Face markings obsolete. Ears very short, their backs pale fawn. 

 No shoulder or flank markings. Arms, legs, and feet grayish- 

 fawn. Terminal pencil of tail yellowish-brown. 



Dimensions. Head and body of <^itnm. about fourteen inches. 



Habitat. North-west Australia. 



References. Thomas, B.M. Catal. p. 71, pis. ix. fig. 9 (upper 

 front teeth), xii. fig. 4: (upper view of skull); Gould, Mamm. Austr. 

 ii. pis. xlviii. 



