DEVELOPMENT OF VASCULAR DENTINE. 
47 
Fig. 24. Tooth of a Haddock ( Gadus ceglejinus ) with its supporting bone, showing its 
manner of attachment. 
Fig. 25. Tooth of Cod ( Gadus morrhua), a tooth of vaso-dentine attached to the sup- 
porting bone by ligaments (l and V), which admit of slight mobility in one 
direction. 
Fig. 26. Section of a hinged tooth of a Hake, with its pulp and supporting bone. It 
is attached to the bone on the left side by a ligament ( l ) ; on the right 
side its base is quite free, and thickened where, in its motions, it impinges 
upon the buttress of bone (c") built up to receive it. 
Fig. 27. Section of a hinged tooth of a Hake, showing the entrance of its vessels 
through a perforation in the ligament, an arrangement by which stretching 
of the vessels is avoided when the tooth is bent down. 
