THE FLYING PHALANGERS, | Ios 
Belideus gracilis, De Vis, Proc. Linn. Soc. N. South Wales, 
vol. vil., p. 619 (1882). 
(Plate XV.) 
Characters.—Size medium ; fur soft and silky, slightly woolly. 
General colour soft pale grey, with a well-defined dark brown or 
black stripe down the back ; under-parts white with a tinge of 
yellow. Ears somewhat variable in size, nearly naked internally, 
and at their tips outside, followed posteriorly by a white or pale 
yellow spot. Upper surface of parachute dark brown or greyish, 
_ the edges fringed with white or pale yellow; feet pale grey or 
white on their upper surfaces. Length of toes in the order s, 
| 4, 3, 2, 1. Tail moderate, very bushy, grey, darkening termi- 
nally into black. Length of head and body about 10 inches ; of 
tail 11 inches. 
Distribution.—Eastern Australia, from Queensland to Vic- 
ly toria. 
II, LESSER FLYING PHALANGER. PETAURUS BREVICEPS. 
| Petaurus (Belideus) breviceps, Waterhouse, Proc. Zool. Soc., 
LOO; Pa 1'52. 
Petaurus breviceps, Gray, in Grey’s Australia, Appendix, vol. ii. 
p. 402 (1841) ; Thomas, Cat. Marsup. Brit. Mus., p, 156 
(1888). ; 
Belideus breviceps, Lesson, Nouv. Tabl. Régne Anim., Mamm., 
p. 189 (1842). 
Belideus ariel, Gould, Proc. Zool. Soc., 1842, p. 11. 
Letaurus (Belideus) notatus, Peters, Monatsber. Ak. Berlin, 
1859, p. 14. 
(Plate XVI.) 
Characters.—Size small; fur soft and silky. General colora- 
tion as in P. sciureus, but with the dark stripe down the back 
generally indistinct. Ears large. Relative lengths of fore toes 
