Dentary movably attached to the tip of the articular bone of the mandible.
The quadrate is invariably a conspicuous bone and movably articulating with the cranium and by a special process with the pterygoid.
Viperidae.-The maxillaries are very short, movably pivoting upon the prefrontals and also attached to the ectopterygoids, so that they can be erected together with the large poison fangs, which, besides reserve teeth, are the only maxillary teeth.
Whether the movably articulated segments which bear the FIG.
In many Crustacea the eyes are borne on stalks which are movably articulated with the head and which may be divided into two or three segments.