PLATE VI. 



Hinged tooth of the Hake (Merluccius) from a longitudinal section taken to 

 one side of the middle line. b. Bone of attachment ; /. uncalcified portion of 

 posterior hinge ; a. anterior hinge ; s. stiffened elastic part of posterior hinge ; 

 d. insertion of calcified tooth into posterior hinge ; e. triangular space occupied 

 by interlacing elastic (?) fibres ; i. insertion of outer portion of posterior hinge 

 into bone of attachment (b). (Drawn by the author from a specimen stained with 

 Mann's methyl -eosin.) x 50. 



B. Diagrammatic representation of bone of attachment viewed from above, 

 the tooth being removed, h. The two halves of the anterior hinge coloured red ; 

 /. pedestal of bone ; r. opposite pulp cavity ; ph. the red dotted line represents 

 the attachment of the posterior hinge ; b. foramen for passage of blood vessels 

 to pulp. 



To face p. 356. 



