is formed, the extremity of which is produced into an angle ; the point of the angle is directed backwards. The 

 portion of the tail which is thus protected beneath, is well clothed with fur above, but the hairs are not long, 

 and the apical portion (which is cylindrical) is much less bushy than in the large flying squirrels constituting 

 the genus Pteromys. The hinder feet have the heel clothed with fur, but the outer margin beneath is naked, 

 and not densely clothed, as in Pteromys. The lateral flying membrane extends from the wrist to the ankle, 

 and is supported moreover by a long cartilage in front, as in Pteromys ; but this cartilage has its origin at the 

 elbow-joint, and not at the wrist, as in the genus just mentioned. The interfemoral membrane extends to the 

 heel, and is moreover attached to the sides of the tail, and when expanded forms almost a straight line. 



"In the structure of the skull Anomalurus differs considerably from the known species of Sciuridm. All 

 the species of the family, the skulls of which I have had an opportunity of examining (and they are numerous, 

 embracing all the known genera and subgenera), are distinguishable by the possession of a distinct post-orbital 

 process to the cranium; they have the palate broad, and terminating in a line with the posterior molars, or 

 behind that line; the molars of opposite sides of the jaw are parallel, and the ant-orbital opening is small, 

 in the form of a tube, and serves only for the transmission of the infra-orbital nerve. These characters are not 

 found in Anomahrus: the post-orbital process is here reduced to a mere rudiment, being represented by an 

 indistinct projection forming an obtuse angle: the ant-orbital opening is large, and evidently affords a passage 

 for a portion of the masseter muscle as well as the nerve ; it moreover opens directly in the bony plate which 

 constitutes the anterior root of the zygomatic arch, and is not produced as it were into a tube, as in the typical 

 Squirrels. The palate is narrow, and has a deep triangular emargination behind, the apex of the triangle being 

 on a line with the hinder margin of the penultimate molar. The molar teeth converge in front, so that the 

 space between the two foremost is scarcely equal in width to one of these teeth; the crowns of the molars of 

 opposite sides of the upper jaw, instead of being on the same plane, or very nearly so, are directed obliquely 

 outwards ; and the masticating surface of those of the lower jaw, to meet them, incline in an opposite direction. 

 The incisive foramina are longer than is usual in the Sciuridce, and encroach in a slight degree upon the 

 maxillary bones. The nasal portion of the skull is narrower, and the nasal bones are remarkable for a deep 

 emargination in front." 



The apparatus of scales was used by the animal to support itself when resting on the trees, 

 which it ascends with great agility. I have observed this animal dart from the top of a lofty tree 

 to another at a considerable distance. Descending 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 ; occasionally, 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. 



Found in the neighbourhood of Clarence, Fernando Po : — 



" The ears are large, much longer than broad, and naked, excepting at the base on the outer side, where they 

 are covered with long fur, like that on the body : the naked portion has a slight flesh-like tint, but is nearly white, 

 as are also the naked portions of the feet and the tip of the muzzle. The hairs of the moustaches are very nume- 

 rous, and although not very thick, are unusually long. The fur is long and remarkably soft, and the hairs of 

 which it is composed are all of one kind ; that is, there are no longer stouter interspersed hairs, such as we 

 usually find in the fur of the rodents ; the fur on the upper parts is sooty black, but, excepting on the membranes, 

 most of the hairs are rather broadly tipped with yellowish rust-colour : on the upper surface of the head the colour 

 is replaced by grey : on the under parts of the body the fur is dirty white : the throat is blackish, and the under 

 side of the throat is tinted with sooty grey. The under side of the membranes is sparingly clothed with hairs : 

 towards the margin the hairs are more numerous, and of a blackish tint." 



Length of the head and body, fourteen inches : tail, eight and a half. 



