TRAGTJLTDJB. 155 



Genus BACHITHERIUM, Filhol 1 . 



This genus is only known by some portions of the mandible and 

 maxilla ; it is said to be closely allied to Gelocus, but differs by 

 wanting the first lower premolar ; the dental formula being 

 1. 1, C. j, Pm. |, M. |. The upper cheek-teeth so closely resemble 

 those of Prodremotherium, that it is very difficult to distinguish 

 them. The position of the genus in the present family is provisional. 



Bachitherium curtum, Filhol 2 . 

 Syn. Gelocus curtu*, Filhol 3 . 



Bachitherium medium, Filhol 4 . 



There is some confusion in the nomenclature of this form. Two 

 imperfect mandibles were figured by Filhol in the Ann. Sci. Geol. 

 vol. viii. pi. xi. fig. 257, pi. xx. fig. 340, under the name of Gelocus 

 curtus. In the Ann. Soc. Sci. Phys. Nat. Toulouse, 1882, p. 124, 

 the first of these is named Bachitherium medium. In the Ann. Sci. 

 Geol. vol. xii. art. 3, p. 241, note 1, it is, however, stated that the 

 specimen was described in the passage last cited as B. curtum. As 

 both specimens appear to belong to the same species, and the name 

 curtum has the priority, this name is adopted here. 



Hob. France. 



M. 2153. Fragment of the left maxilla, containing the last four 

 cheek-teeth ; from the Upper Eocene of Caylux (Tarn- 

 et-Garonne), France. The teeth of this specimen agree 

 precisely with those described by Filhol in the Ann. Soc. 

 Sci. Phys. Nat. Toulouse, 1882, pp. 126-7 ; the length of 

 the space occupied by the three true molars is 0,0204. 



Purchased, 1885. 



M. 2154. Fragment of the left maxilla, containing mm. 3, mm. 4, 

 and m- 1 ; from the Upper Eocene of Caylux. 



Purchased, 1885. 



M. 2157. Part of the right ramus of the mandible, containing the 

 last five cheek-teeth ; from the Upper Eocene of Caylux. 

 The length of the space occupied by the three true molars 

 is 0,027. Purchased, 1885. 



1 Comptes Rendus, vol. xciv. p. 138 (1882). 



2 Ann. Sci. Geol. vol. viii. art. 1, p. 236 (1877), Gelocus. 



3 Loc. cit. 



4 Ann. Soc. Sci. Phys. Nat. Toulouse, 1882, p. 124. 



