The eyelids are circular orifices
concealed in the hair, and, in the male, are with difficulty discovered;
but in the female there is a tuft of lighter hair, which marks their
situation.
The external ears are two large slits, directly behind the eyes, and
much larger than the orifices of the eyelids.
The teeth, if they can be so called, are all grinders; they are four in
number, situated in the posterior part of the mouth, one on each side of
the upper and under jaw, and have broad flat crowns. They differ from
common teeth very materially, having neither enamel nor bone, but being
composed of a horny substance only, embedded in the gum, to which they
are connected by an irregular surface in the place of fangs. When cut
through, which is readily done by a knife, the internal structure is
fibrous like the human nail: the direction of the fibres is from the
crown downwards.
Between the cheek and the jaw, on each side of the mouth, there is a
pouch, as in the monkey tribe, lined with a cuticle.
Pages:
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571