ntioned; and the third, which is very large, rounded and
placed obliquely inwards in front, and outwards behind. Professor
Milne-Edwards remarks that he knows not amongst the carnivora a
similar example of a tooth so disposed. That of _Ailurus_ shows the
least difference, that is to say it is nearest in structure, having
also six lobes, but more thick-set or depressed.

The true molars are remarkable for their enormous development: the
first is almost square, with blunt rounded cusps, four-fanged, and
presenting a strange mixture of characteristics, in its outward
portion resembling an essentially carnivorous type, and its internal
portion that of molars intended to triturate vegetable substances.
Amongst bears, and especially the Malayan bears, this character is
presented, but in a less striking degree; the panda resembles it more,
with certain restrictions, but the most striking analogy is with the
genus _Hyaenarctos_.

The last molar is peculiar in shape, longer than broad, and is
tuberculous, as in the bears, but it differs in this respect from
the pandas, in which the last molar is almost a repetition of the
preceding one, and its longitudinal diameter is less than its
transverse.

In the lower jaw the first premolar, instead of being small and
tuberculate, as its corresponding tooth in the upper jaw, is large,
double-fanged, trenchant and tri-lobed, resembling, except for size,
the two following ones. The second is not inserted obliquely like
its correspondent in the upper jaw, its axis is in a line with that
of its neighbours; tricuspidate, the middle lobe being the highest.
The third premolar is very large, and agrees with its upper one,
excepting the lobule on the inner border.

The first true molar is longer than broad, and wider in front; the
crown, with five conical tubercles in two groups, separated by a
transverse groove; the next molar is thicker and stouter than the
preceding one, and the last is smaller, and both much resemble those
of the bears, and differ notably from the pandas.

From what M. Milne-Edwards describes, we may briefly epitomise that
the premolarial dentition of the _Ailuropus_ is ailuroid or feline,
and that the true molars are arctoid or ursine.

The skull is remarkable for the elongation of the cranium and the
elevation of the occipital crest, for the shortness of the muzzle,
for the depression of the post-frontal portion, and for the enormous
development of the zygomatic arch