On a Collection of Mammals from Central and Northern Queensland. 391 



portionally large ; their length is about equal to the breadth of the 

 palate between the innermost molars. 



Tlie teeth. The deritition in both is: 

 ih ci.ph mf (30). 



In the Upper jaw the central incisors are bent strongly inwards 

 at the end; P is ooly a little larger than i'^, and is furnished with 

 a groove. 



The canine is small and slender. The premolar (p^^) is long, 

 longer than the nearest molar, and shows 3 — 4 grooves down its 

 exterior surface. In the lower jaw the premolar is somewhat smaller 

 than in the upper jaw, 



36. JPetrogale penicillata (Gray) 1827. 



ICangurus penicillatus Grat, in : Geiff. Anim. Kingd. vol. III, pl. 49 (an 

 almost undistinguishable figure) vol. V, p. 527 (1827). 



Petrogale pencillata Grat, in: Chablesw. Mag. Nat. Hist., Nov. 1837, (new 

 ser.) vol. I, p. 583 (1837). 



A. Young (of B), Coomooboolaroo, Jan. 1882 (skin with skull). 



B. Female, Coomooboolaroo, Jan. 1882 (skin with skull). 



C. Coomooboolaroo, Jan. 1882 (skull). 



D. Coomooboolaroo, Jan. 1882 (incomplete skeleton). 



E. Male, Coomooboolaroo, Jan. 1882 (skin with skull). 



F. Coomooboolaroo, Jan. 1882 (incomplete skeleton). 



This species is extremely numerous at Coomooboolaroo and other 

 places in Central Queensland, whilst other Rock-Kangaroo's were not 

 collected by Dr. L. 



B and C are young individuals, scarcely fuUgrown, although 

 about equal in size to the others, as the innermost molar (m*) in both 

 jaws has not yet appeared; one of them nevertheless carried a large 

 young one in its pouch (A). 



In the other specimens the back molar has just risen above the 

 alveolar border, but only in the last is it fully developed, and has 

 traces of being worn. 



The Upper part of the back and neck are of a silvery grey colour ; 

 the hinder part of the back and the loins are more reddish brown. 

 A narrow black stripe extends backwards from the forehead , and va- 

 nishes in the neck'). The upper part of the head is greyish brown, 



1) GoTJLD, Mamm. Austr. pt. V (1853) describes this line as „running 

 from the middle of the forehead nearly half way down the back", a cha- 

 racter, which in reality scarcely belongs to this species. 



