119 



The jaw contained a series of eight molar teeth and a canine separated 

 from the former by a small hiatus. ' Of the molar teeth, the specimen retains 

 part of the first molar and the succeeding molar, represented in Figs. 7, 8, 

 and the intermediate three premolars represented in Figs. 9, 10. 



The jaw-fragment agrees in its form and proportions with the correspond- 

 ing part in the existing fox. The teeth also, so far as they are preserved, are 

 nearly like those of the latter animal. 



The canine tooth was equally well developed as in the latter, and the first 

 premolar is inserted by a single fang. The second premolar likewise resem- 

 bles the corresponding tooth of the fox. 



The third premolar is peculiar, and perhaps anomalous. It resembles more 

 the form of an upper premolar than the usual form of lower premolars. It 

 has three fangs, of which two are inserted in a line with those of the con- 

 tiguous teeth, while the third fang is external. The crown is a four-sided 

 pyramid with projecting basal angles, of which the postero-internal one is the 

 most prominent. 



The fourth premolar is like the last one of the fox, but is proportionately 

 thicker. The fifth premolar is lost, and, like the preceding tooth, was inserted 

 by a pair of fangs. 



The first molar has lost the fore part of its crown, and this appears not to 

 have been proportionately so well developed as in the fox. The crown of 

 the second molar is nearly of the same form as in the latter. 



The last molar is a small tooth, as in the fox, and is also inserted by a single 

 fang. 



The measurements of the specimen are as follows : 



Lines. 



Depth of lower jaw at second premolar . . 4. 8 



Depth of lower jaw at first molar 4. 8 



Distance from fore part of canine to back of last molar ... 18. 



Length of the molar series 14. 8 



Length of the premolar series 8. 8 



Length of the true molar series CO 



Breadth of second premolar 1. 7 



Breadth of third premolar '. 1. 5 



Breadth of the fourth premolar 1. 6 



Breadth of the fifth premolar .2. 4 



Breadth of the first molar 3. 2 



Breadth of second molar 2. 



Breadth of third molar , 1.0 



The main peculiarity of the fossil is the presence of an eighth tooth to the 



