THE TEETH OF MAMMALS. 



301 



In the elephant seal the milk teeth are yet more rudi- 

 mentary, and the difference between its dentition and that 

 of the monophyodont homodont cetacean (Grampus) is not 



FIG. 128 f 1 ). 



great ; an observation which is the more interesting, inas- 

 much as this seal in other characters than its teeth ap- 

 proaches towards the cetacean group. From these facts, 

 which are well indicated in the accompanying figures, Pro- 

 fessor Flower argues that the permanent set of teeth of 



(*) Permanent and milk dentition of an Elephant Seal (Cystophora 

 proboscidea). 



( 2 ) Teeth of the truly monophyodal Grampus (Orca capensis). (These 

 four figures are copied from Prof. Flower's paper). 



