192 EVOLUTION OF MAMMALIAN MOLAR TEETH 



by which the Zeuglodontia are thought by Professor Fraas to have 

 been connected with the Creodonta and especially the Hyfenodonti<l;r. 

 If in turn the Zeuglodonts should be shown to be related to the 

 Odontocete Whales, through Squalodon and the Miocene Platanistidse, 

 the ultimate derivation of the Cetacean cheek teeth from the trituber- 

 cular type would no longer be in doubt. 



