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A MANUAL OF DENTAL ANATOMY. 



of Lepidosteus (North American bony pike) ; or sometimes 

 there are several branches. 



FIG. 38 



In Lepidosteus oxyurus there are simple inflections, and 

 a central pulp cavity; in L. spatula the inflections are 

 branched, and the central pulp cavity all filled up. 



In the foregoing figure of the base of a tooth of Lepi- 

 dosteus some few of the outrunning pulp chambers are 



( l ) Transverse section across the tooth of Lepidosteus spatula. At the 

 exterior are regularly disposed radiating plates of dentine, each with its 

 own pulp cavity, while the central area is composed of more or less cylin- 

 drical pulp chambers, each of which, forms the starting point for its own 

 system of dentinal tubes. The pulp chambers are made dark in the figure 

 for the sake of greater distinctness. 



