1864.] AND DENTITION OF THE LEMURIDE. 613 
to be almost completely hidden by the canine when the skull is 
viewed laterally *. 
The bony palate is not produced backwards, the middle or most 
anterior point of its hinder margin being in a line with the middle of 
the last molar. The pterygoid-fossa is large. There is no conspi- 
cuous foramen for the internal carotid on the basis cranii, as there 
is in Galago, Perodicticus, and others. Beneath the outer part of 
the inferior margin of the orbit there is a large malar foramen. 
Hapalemur. Scale, 14 nat. size. 
The mandible is perhaps the most characteristic + part of the bony 
framework of the head of Hapalemur. The angle is produced down- 
wards, backwards, and somewhat inwards, as much as, or even more 
than, in the genus Indris. 
The symphysis is very convex from above downwards, and the 
coronoid process is exceedingly produced. 
The dentition of Hapalemur is quite peculiar. From the small 
size of the canine above and of the first premolar below, and the 
pretty equal vertical development of the premolars and molars, the 
whole series of teeth on each side of each jaw appears, when viewed 
laterally, remarkably uniform and equal—more so than in any other 
* This is not quite so in Van der Hoeven’s figure, but in it the skull is not 
represented exactly in profile. 
t M. Isid. G. St.-Hilaire, in his ‘ Catalogue des Primates,’ p. 75, says that the 
mandible of his . olivaceus is “‘d’une forme notablement différente dans sa 
partie postérieure.” Unfortunately he does not add how it differs. 
