1877.] MARSUPIALS FROM DUKE-OF-YORK ISLAND. 125 
This handsome Rat is most nearly allied to the species froin 
Salawatti, recently described by Dr. Peters and the Marquis G. 
Doria as U. druijni’; but it is about a third smaller, is more 
uniformly rufous in colour, and has the tail markedly shorter (in- 
stead of longer) than the head and body. All the other described 
species have long particoloured tails’. 
Dr. Peters, in his original characters of this genus’, says that the 
dentition is quite similar to that of Mus; but one of the present 
specimens, having the teeth less worn than in his example of 
U. macropus, shows that the ridges of the molars are not definitely 
divided into tubercles. The viscera are almost exactly like those of 
the common Rat, except that the czecum is slightly more elongated. 
3. PERAMELES DOREYANUS. 
Perameles doreyanus, Quoy et Gaim. Voy. de l Astrolabe, i. 
p- 100, Atlas, pl. xvi. 
The collection contains one skin of this well-known Papuan species. 
First discovered (but not systematically named) by Lesson and 
Garnot on the island of Waigiou’, it was afterwards found by Quoy 
and Gaimard at Dorey Harbour, New Guinea. According to Dr. 
Gray, specimens were sent by Mr. Wallace from the Aru Islands? ; 
but the Perameles of that group has since been separated by Dr. 
Peters and the Marquis G. Doria as P. aruensis®; and the same 
authors have described two other allied species—P. rufescens from 
the Ké Islands’, and P. longicaudata from New Guinea’. 
4. BELIDEUS ARIEL. 
Belideus ariel, Gould, P. Z. S. 1842, p. 11. 
This pretty little Flying Phalanger is represented by an adult male 
and female in skin, and an immature male in spirit. In the female 
the extreme tip of the tail is white, doubtless an individual variety. 
As in other Papuan examples, there is a much broader dark mark 
round the eye than in the North-Australian specimens described by 
Mr. Gould’ ; but I do not think they can be specifically separated ; 
and when a sufiicient series from different parts of the continent of 
Australia are compared I suspect that this species will have to be 
united with the southern B. éreviceps. 
The known range of this Phalanger is extensive. First described 
from North Australia, it has been found in New Guinea by S. 
Miller, in Batchian and the Aru Islands by Wallace and Von 
Rosenberg, and in Halmahera by Bernstein. 
1 Ann. Mus. Civ. Genova, viii. p. 336 (1876). 
2 Dr. A. B. Meyer lately andipued a new species from New Guinea under 
the name of U. papuanus (Ann. and Mag. Nat. Hist. 1876, xvii. p. 146), with- 
out giving any description. As he states, however, that it is nearly allied to 
U aruensis, Gray, it can hardly be the present animal. 
3 Monatsb. Ak. Berlin, 1867, p. 343. + Voy. de la Coquille, i. pt. 1, p. 128. 
OPS Zais. gn P 113. 6 Ann, Mus. Ciy. Genova, vii. p. 542. 
7 Op. cit. p 8 Op. cit. viii. p. 335. 
® In the alee in the ‘Mammals of Australia’ (i. pl. xxvii.) no black mark 
whatever is shown; but a narrow black line is mentioned in the description. 
