176 



rNGULATA. 



M. 1404 b. Six rami of the mandible ; from the Upper Eocene of 

 Caylux (Tarn-et-Garonne), France. These specimens 

 agree with the type mandible figured by Filhol in the 

 Ann. Sci. Geol. vol. viii. pi. xix. figs. 314-316. The 

 length of the space occupied by the last five teeth is 0,019. 



Purchased, 1884. 



Csenotherium filholi, Lydekker 1 . 



This species is about the size of C. laticurvatum, but has a shorter 

 series of cheek-teeth. It is distinguished by the presence of a dia- 

 stema occurring between the canine and the first premolar in the 

 upper, and between the first and second premolars in the lower jaw; 

 by the absence of frontal sulci ; and above all by the peculiar form 

 of the nasals, which are short, oval, and sharply pointed anteriorly. 

 These differ from those of any other described species, in all of which 



Fig. 22. 



Ctenotherium filholi. Upper and lower views of the cranium ; from 

 the Upper Eocene of Caylux. \ . 



1 Geol. Mag. dec. 3, vol. ii. p. 64 (1885). 



