1864.] AND DENTITION OF THE LEMURID&. 629 
which there are skins in the British Museum, also two specimens in 
spirits, an imperfect skull, and a complete skeleton. The skull and 
the external form are well represented in the ‘ Proceedings of the 
Zoological Society’ *. 
This is the genus Hemigalago of Dr. Dahlbom, who gives for dis- 
tinctive characters :—‘‘ Cranium spherical ; ears large, oval, membra- 
nous, transparent; general form like that of Galago, but smaller ; 
eyes large, projecting, separated by a distance of six or seven milli- 
metres. Nose projecting, small, conically compressed, elongated 
anteriorly, projecting above the upper lip. Teeth as in Galago. 
Body short, rather thick, cylindrical. Members with the same pro- 
portions as those of Galago, except that the fingers are much more 
slender’ +. These characters do not appear to me very distinctive, 
and Iam convinced that this species cannot be separated generically 
from the other Galagos, and I have doubts as to the propriety of 
separating it from them even subgenerically. But the premaxilla 
projects forwards and upwards in a peculiar way beyond the upper 
incisors, reminding one somewhat of Loris gracilis, and presenting 
an appearance, when the basis cranii is observed, similar to that seen 
in Microcebus pusillus as represented by M. Gervaist. The angle 
of the mandible is produced a little downwards as well as backwards. 
There is considerable difference in size between the second and third 
upper premolars. The last upper molar has only three tubercles, but 
the last lower one is quinquecuspid. 
This species, as has been shown by Dr. Peters$, is undoubtedly 
the Otolienus peli of M. Temminck. 
The rest of the Galagos may be considered to constitute the sub- 
genus Galago (Otolicnus) ||. In all of them, as has been said, the 
muzzle is shorter than the orbit when the skull is viewed laterally. 
The angle of the mandible is produced backwards, but scarcely down- 
wards. The last upper molar has sometimes three tubercles, some- 
times four ; but the last inferior molar is always quinquecuspid. G. 
(Otolicnus) allenii, as Professor Huxley has pointed out, differs 
from the other species in the great development of the “talon” in 
the second upper premolar; and as the last upper molar is quadri- 
cuspidate, this species is remarkable for the uniformity in size of its 
upper dental series. There is a skin of this species in the British 
Museum, which came from Fernando Po. It is marked 64. 4. 4.17, 
and the skull extracted from it is no.68 @. Another skin, very like 
the preceding, but from the Gaboon, is marked 64. 2. 18. 1, and the 
extracted skull is no. 68d. There is also the skin and complete 
* 1865, page 148 and pl. xxxv. 
t+ Dahlbom’s ‘Studia Zoologica,’ p. 230, from the French translation by Dr. 
Coquerel, Joc. cit. 
+ Hist. Nat. des Mammiferes, p. 173. 
§ Proc. Zool. Soc. 1863, p. 381. 
|| First used by Llliger in his ‘ Prodromus,’ p. 74 (1811), and applied by him 
to the Lemur galago of Schreber, which is considered by his continuator, J. A. 
Wagner, as identical with his (Wagner’s) Ofolicenus senegalensis (a species of my 
subgenus Ofolicnus): see Wagner’s Supp. i. p. 292. 
{7 See ante, p. 324. 
