the permanent false molar is in place together
with four true molars, and which would therefore be a species of
Halmaturus of Fred. Cuvier.

Macropus.

(V.) Part of the left ramus of the lower jaw, with two grinders in place,
and a third which has not quite cut through the jaw.

(V.a.) Sixth and seventh grinders according to the order of their
development, right side, upper jaw, of a kangaroo not quite so large as
Macropus major.

Several other bones and portions of bone are referable to the genus
Macropus, but they do not afford information of sufficient interest or
importance to be specially noticed.

GENUS HYPSIPRYMNUS.

Hypsiprymnus, sp. indeterminate.

(VI.) Figures 1 and 2 Plate 48. A portion of the upper jaw and palate
with the deciduous false molar and four true molars in place on each
side; the fifth or posterior molar is concealed in the alveolus, as also
the crown of the permanent false molar.

Hypsiprymnus.

(VI.a.) Figure 3 Plate 48. Part of the right ramus of the lower jaw,
exhibiting a corresponding stage of dentition.

Observation. This species is rather larger than any of the three species
with the crania of which I have had the opportunity of comparing them:
there is no evidence that it agrees with any existing species.

GENUS PHALANGISTA.

(VII.) Cranium, coated with stalactite.

(VII.a.) Part of right ramus, with spurious and 2nd molar.

(VII.b.) Right ramus, lower jaw.

Observation. The two latter specimens disagree with Phalangista vulpina
in having the spurious molar of relatively smaller size, and the 2nd
molar narrower: the symphysis of the lower jaw is also one line deeper in
the fossil. As the two latter specimens agree in size with the cranium,
they probably are all parts of the same species, of which there is no
proof that it corresponds with any existing species. But a comparison of
the fossils with the bones of these species (which are much wanted in our
osteological collections) is obviously necessary to establish the
important fact of the specific difference or otherwise of the extinct
Phalanger.

GENUS PHASCOLOMYS.

Sp. Phascolomys mitchellii, a new species.

(VIII.) Figure 4 Plate 48. Mutilated cranium.

(VIII.a.) Figure 5 Plate 48. Part of lower jaw belonging to the above.

(VIII.b.) Figure 6 Plate 48. Right series of molar teeth in situ.

(VIII.c.) Right ramus of the lower jaw.

Observation. These remains come nearer to the existing species than do
those