II.c.  Lower extremity of right femur, with the epiphysis separated, showing its correspondence in age with the animals to which the fossil jaws belonged.

II.d. 5th Lumbar vertebra, Figure 8 Plate 47.

II.e. 10th or 11th Caudal vertebra.  The proportion of this bone indicates that these great kangaroos had a relatively stouter and perhaps shorter tail than the existing species.

Macropus sp. indeterminate.  Agrees in size with Macropus major, but there is a difference in the form of the sacrum:  the second vertebra of which is more compressed—­to this species which cannot be determined till the teeth be found, I refer the specimens marked: 

III.  Sacrum.

III.a.  Proximal end of left femur.

III.b.  Proximal end of left tibia, in which the anterior spine sinks more gradually into the shaft than in Macropus major.  As this is the only species with the skeleton of which I have been enabled to compare the preceding fragments, I am not able to pronounce as to their specific distinctness from other existing species of equal size with the Macropus major.

Macropus sp. indeterminate.  From want of skeletons of existing species of kangaroo, I must also leave doubtful the specific determination of a species smaller than Macropus major, represented by the left ramus of the lower jaw (IV) in which 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.