<<LESS 
OF THE ORANG UTANS. 171 
The main and characteristic difference then between the Simia AZorio and the Pongo, 
whether of Borneo or Sumatra, obtains in the size of the laniary or canine teeth, to 
the smaller development of which in the Stmia Morio, almost all the other differences in 
the cranium are subordinate or consequent’. The laniary teeth, it may be observed, 
have little relation to the kind of food habitual to the Orangs ; had they been so related 
they would have been accompanied with a structure of the glenoid cavity fitting them, 
as in the true Carnivora, to retain a living prey in their gripe, till its life was extin- 
guished or resistance effectually quelled. But the flattened surfaces on which the con- 
dyles of the lower jaw rotate are in subserviency to the broad tuberculate molars, 
showing the mastication of vegetable substances to be the habitual business of the jaws, 
1 With respect to minor differences not noticed in the description, these may be deduced from the subjoined 
table of comparative admeasurements. 
Simia Simia 
Morio, Wurmbii, 
adult. adult male. 
inch. lin. 
Length of the skull from the vertex to the base of the occipital condyle 
Length of the skull from the posterior plane of the occiput to the margin of the : 
incisors 
— 
on 
nr ae 
Length of the skull from the fronto-nasal suture to the margin of the incisors .... 
Greatest lateral diameter of the skull (at the post-auditory ridges) 
Smallest lateral diameter of the skull (behind the orbits) 
Distance between temporal ridges 
Diameter of the skull at the zygomata 
Length of the zygomatic fossa 
Diameter of skull taken between the outsides of the orbits 
Interorbital space 
Transverse diameter of orbital cavity 
Vertical diameter of orbital cavity 
Vertical diameter of nasal aperture 
Transverse diameter of nasal aperture 
Interspace between infraorbital foramina 
Distance between the inferior margin of the nasal bone and the inferior margin of 
the intermaxillary bone 
From the anterior margin of the occipital foramen to the posterior margin of the 
bony palate 
Length of the bony palate along the mesial suture 
From the anterior margin of the intermaxillary bones to the anterior palatal 
foramina 
Breadth of the crown of the first incisor, upper jaw 
Breadth of the crown of the second incisor, upper jaw 
Breadth of the four incisors, in situ, upper jaw 
Longitudinal extent of grinding surface of the molares, bicuspides included, of one 
side, upper jaw 
Length of the enamelled crown of the canine tooth, upper jaw 
Breadth of ditto 
Length of the lower jaw from the condyle to the anterior surface of the sockets 
of the incisors 
Length of the ramus of the lower jaw 
Greatest breadth of ditto 
to 
CONE KE RRP SEN MDONTH 
CSCOANAnNARDOOORN LH 
4 
1 
8 
4 
7 
1 
9 
6 
4 
3 
6 
1 
9 
7 
5 
ee 
a 
Oo w 
- 
Cs | 
oo Ko iw) m2 o 
Nor NT OF DO KF OO KH £ LY 
be) Ops c Oo 
He Rh OO OH 
