38 J. Wyman on the Engé-ena. 
inal description of the ossa nasi, “as having a more triangular 
form than in the Chimpanzée, the apex being more acute,” still 
holds good. If, however, the bone referred to prove to be a por- 
tion of the nasals, we shall have in this another index of inferi- 
ority to the Chimpanzée, as it is a repetition of what is met with 
in the lower quadrumana. 
Teeth.—The molars alone remain, the incisors and canines 
having been lost. The length of the grinding surface of the 
molar teeth is 29 inches, the two rows being nearly parallel to 
each other. This is true of the alveoli, though the crowns 
slightly diverge from each other posteriorly in consequence of a 
inclinatiom outwards. Nearly all of the cusps of the teeth are 
rfect, those of the first molar being the most worn, as woul 
naturally be expected, it being the first which is protruded. The 
inner cusps of this tooth are worn nearly to the base; the outer 
are but slightly abraded, and the same is the case with the mner 
cusps of the second molar; with these exceptions the points of 
the different crowns of the molars and premolars are entire. 
In comparing their grinding surface with that of the human 
jaw, one cannot but be struck with its greater extent, with the 
much greater development of the outer row of cusps, and the 
high ridge which on all three of the molars connects the outer 
. 
buried in its bony cavity, the roots not having as yet been de- 
veloped. In the configuration of its grinding surface it did not 
conform with either of the other teeth. 
lute.—By reference to the table of measurements, it 
will be seen that the space between the incisive alveoli and the 
edge of the hard palate is much greater proportionally than in 
the Chimpanzée. The median suture has disappeared and only 
slight indications remain of a former suture between the maxil- 
laries and the ossa palati. The emargination on the middle of 
the edge of the palate is much less distinct than in either of the 
other specimens which I have examined, or than in that figured 
by Prof. Owen. 
The Vomer has the same thin and delicate structure as in the 
other crania and does not meet the ossa palati at the posterior edge. 
Cranial capacity.—In studying the anatomical characters of 
this and the allied quadrumana with reference to their zoological 
position, nothing can be more desirable than to have accurate 
knowledge with regard to the structure and dimensions of the 
brain, for this may be regarded as one of st i of all 
ae 
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