127 
is slightly indented, both on the outer and inner side, and the poste- 
rior inner angle is somewhat produced; in the young animal it is 
more distinctly produced and is acute, and the outer and inner in- 
dentations are scarcely traceable. The molars of the lower jaw have 
each a strong indentation on the outer side. The folds of enamel 
cross the crowns of the molars in the transverse direction, and the 
spaces between the folds (four or three in number) are about equal 
in width to these folds. The masticating surfaces of these teeth are 
worn flat by usage, even in the comparatively young animal, as in 
other Rodents which have a large ant-orbital opening, and have not 
the tubercular surface such as we find in the molars of the typical 
Squirrels. These last-mentioned animals, it would appear, have a 
rotatory motion of the lower jaw, whilst the Anomaluri have a lon- 
gitudinal, no doubt combined with the rotatory motion; and this 
difference is perhaps due to the action of that portion of the masse- 
ter muscle which passes through the ant-orbital opening. 
The apparatus of scales, Mr. Fraser remarked, was used by the 
animal to support itself when resting on the trees, which it ascends 
with great agility. He had observed this animal dart from the 
top of a lofty tree to another at a considerable distance. Descend- 
ing at an angle, it aimed with great nicety at the trunk of the tree 
on which it intended to alight, and, settling near the base, it would 
again ascend to travel to a third tree in the same manner ; occasion- 
ally, when high up on the trunk, it would rest itself, making use of 
the singular apparatus of scales on the under side of the tail. The 
unarmed portion of the tail was then turned backwards and upwards. 
Mr. Waterhouse then proceeded to characterize three new species 
of Squirrels from Mr. Fraser’s collection, as follows:— ~ 
Scrurus Srancerr. Sc. pilis longis et rigidis, nigro et flavescenti- 
penicillatis ; genis, guld, corporeque subtis pilis sparse obtectis, his 
plerumque pallidis ; caudd magnd, nigro alboque annulatd ; auribus 
parvulis ; foramine infra-orbitali haud in canali educto. 
une. lin, 
Longitudo ab apice rostri ad caude basin.... 12 0 
caud@........ fetahaet ovo, sWoiebetar ru 15 0 
FOP SU MIG OT UMGUE:, sce ess ss 2 8i 
ESAT MET meine ea, sk ARS 6 coe 0 5 
Hab. in Insula Fernando Po. 
_ The most striking external characters of this species consist in its 
large tail, which is ringed with black and white; the crispness of 
the fur and the seminaked condition of the under parts of the body, 
the sides of the face, muzzle, throat, and the inner side of the limbs: 
—all these parts are so sparingly clothed with hairs that the skin is 
visible. On the upper parts of the body there is scarcely any trace 
of the finer under-fur, nearly all the hairs being of the same harsh 
character; they are black, broadly annulated with yellowish white 
or rusty yellow; on the fore parts of the body the former tint pre- 
vails, but the hinder parts may be described as black, freely pencilled 
with bright rusty yellow; on the hind limbs this last-mentioned 
Nek Lor, | 
Now 4. (B42 
