TEETH OF PHYSETER 



13 



form and nature will be dealt with presently. We see in these 

 tooth rudiments, early in the series, a commencing of the various 

 characteristics of the fully developed embryonic teeth of this 



Text-fig. 8. 



■^ 



ip.. 



A more advanced tooth rudiment. In addition to the more marked 

 bending of the rudiment of the ])ermanent tooth, the commence- 

 ment of the milk rudiment and the residual lamina is to be seen. 

 In all these three figures the dental ]5a])illa is a mere thickening of 

 the mesoderm tissue. 



young foetus. It must not, however, be assumed that the 

 labial bud-like outgrowths of the dental lamina are subsequent 



