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49 f ;

to before,"* &c. &c. Although the jaws increase propor-
tionally more between the last deciduous tooth and the con-
dyles, yet it must be conceded that during the puerile state,
every part of the jaws increase, as do all the other mem-
bers of the body, the deciduous teeth excepted.

SECTION VII.

ANATOMY OF THE TEETH.
These organs in the adult are divided into four classes
incisores, cuspidati, bicuspides,J and molares. They differ
very much in the figure of their bodies, and in the number
and shape of their fangs. The cuspidati are of a middle
nature between the incisores and the bicuspides ; as are the
latter between the cuspidati and the molares.
The incisores, or cutting teeth, are situated in the anterior
part of the jaw, and form the front of the mouth. In each
jaw they are four in number, and are so placed, that the two
central stand somewhat more advanced than the lateral.
The
The bodies of the incisores are broad and rather flat.
anterior surface is convex, the posterior concave ; they both
go off from the neck of the tooth somewhat sloping. The
two surfaces terminate in a cutting edge, which is placed in
a direct line with the apex of the fang.
When viewed in
front, the cutting edge is seen to be the broadest part of the
tooth, but gradually becomes smaller as we approach to the

* " See Fox and Hunter."
f Fox, chap. 2.
"'
This class is wanting in the infant set.
7