Country between Morcton Bay and Port Essington. 107 
One bird seemed to be closely attached to the cypress pine; for 
its remarkable note was heard whenever we were near these trees. 
It was heard at night, and particularly towards morning; the note 
was a melodious repetition of “ gluck, gluck,” which terminated 
in a kind of shake. Mr. Gilbert did not know it, and we could 
never get a sight of it; its voice was besides extremely deceiving 
as to distance. The very pleasing note of another bird was heard 
in the most rocky intricate part of Arnheim’s Land; it was the 
repetition of a long full whistle, rising each time about half a note. 
Quadrupeds.—Respecting the quadrupeds, it may be mentioned 
that the common grey kangaroo (macropus major) lives along the 
whole east coast of Australia, and that we killed the last at the 
Van Diemen River; the open grassy forest of which abounded 
with them. At the west coast of the gulf, the red forester of Port 
Essington (osphranter Antilopenus, Gld.),took its place, and was 
tolerably numerous in small flocks. The walluru (osphranter 
robustus) was observed last in the rocky wilds of the Upper South 
Alligator River. Rock wallabies, resembling petrogale lateralis, 
Gld., were living amongst the cliffs of Ruined Castle Creek, in lat. 
25° 9'. At the Mitchell we met a brush wallabi of a brownish 
colour and very coarse hair (halmaturus agilis, Gld.), which was 
common all round the Gulf of Carpentaria. At the head of the 
gulf a dark grey kangaroo was killed; it had a nail at the end of 
the tail, but appeared to differ from macropus unguifer of Gould, 
in its darker colour. Lagorchestes was killed at the table land of 
the Burdekin. The kangaroo-rat (Bettongia) was observed 
wherever dry grass offered a hiding place. It did not differ 
from the spec.es of Moreton Bay (B. rufescens); in the scrubs 
one of my blackfellows saw, however, another species with a 
tawny back, which became black towards the hinder extremities. 
The opossums and flying squirrels seemed to disappear to the 
northward, or were at least so silent at night that we became 
rarely aware of their presence. On the Upper Burdekin, on the 
Lynd and Mitchell, the ring-tailed opossum (Phalangista Cookii) 
was caught, and at Port Essington opossums and sugar-squirrels 
(Petaurus sciureus) had been very numerous according to Captain 
