Double-rooted Tooth from the Purbeck Beds. 275 
cynodontide the canine is said to have two roots, and the 
character is recognized in the genera Diplocynodon, Docodon, 
Euneodon ; and in the Spalacotherids: Menacodon is said to 
have two roots to the canine. In all these forms no further 
evidence is available from Professor Marsh’s figures of a 
divided root, than the appearance of division at the base of 
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” 
Maxillary canine of Zriconedon ferax. Enlarged 10 times. 
[root]. Secondly, there is a portion of the jaw of Trico- 
nodon ferox, which Professor Osborn describes, and he states 
that it shows “‘as an important character the bifanged upper 
