Double-rooted Tooth from the Purbeck Beds. 275 



cynodontidge the canine is said to liavc two roots, and the 

 character is recognized in the genera Diploct/nodon, Docodon, 

 Euneodon ; and in the Spalacotheridffi Menacodon is said to 

 have two roots to the canine. In all these forms no further 

 evidence is available from Professor ]\Iarsh's figures of a 

 divided root, than the appearance of division at the base ot 

 the crown. 



Professor Osborn has also affirmed the division of the root 

 of the canine in an English genus, of which examples are 

 preserved in the British Museum. First, with regard to the 

 genus Kurtodon the side of the tooth is stated to show " a 

 faint median groove which may indicate a double fang" 



\J 



Miixillary caniuc of Tricvnodon ferax. Enlarged 10 times. 



[root]. Secondly, there is a portion of the jaw of Trico- 

 nodon ferox^ which Professor Osborn describes, and he states 

 tiiat it shows " as an important character the bifanged upper 



