THE RING-TAILED PHALANGERS. 93 
mation to the same structure in the corresponding teeth of 
young Cuscuses. 
I. SOMBRE PHALANGER. PSEUDOCHIRUS LEMUROIDES., 
Phalangista lemuroides, Collett, Proc. Zool. Soc, 1884, 
p 365. 
Pseudochirus (Hemibelideus) lemuroides, Collett, Zool. Jahr- 
buch, vol. 11., p. 923 (1887). 
Pseudochirus lemuroides, Thomas, Cat. Marsup. Brit. Mus., 
p. 170 (1888). 
Characters.—Size rather large ; fur soft and woolly ; general 
colour dark brownish-grey ; under-parts dirty yellowish-grey ; 
ears of moderate length. Limbs dark brown, becoming black 
terminally ; tail rather short, clothed with uniform thick black 
fur, the naked inferior portion short. Length of head and body 
about 15 inches ; of tail 12 inches. 
This and the next four species constitute the first group of 
the genus, in which the ears are of medium length, not ex- 
cessively short, and longer than broad ; the tail being tipped 
with white, except in the present species. 
Distribution—Central Queensland, in the Herbert river dis- 
trict. 
This species, which is known to the natives by the name of 
““Vappi,” is said to be fairly abundant in some portions of its 
range, although it has but recently been made known to 
science. 
II, HERBERT-RIVER PHALANGER. PSEUDOCHIRUS 
HERBERTENSIS, 
Phalangista herbertensis, Collett, Proc. Zool. Soc., 1884, p. 383. 
Pseudochirus mongan, De Vis, Proc. Linn. Soc., New South 
Wales, ser. 2, vol. i., p. 1130 (1888). 
