TRAGTTLIDJB. 157 



space occupied by the three true molars is 0,025, and 

 that of the diastema 0,0225. Purchased, 1884. 



M. 2155. Hinder part of the left ramus of the mandible, containing 

 m. 2 and m . 3 ; from the Upper Eocene of Caylux. The 

 length of m73 is 0,011. Purchased, 1885. 



M. 1428. The greater part of the left ramus of the mandible of a 

 young individual, containing the milk-molars, mTl, and 

 m. 2 ; from the Upper Eocene of Caylux. This specimen 

 is similar to No. M. 1427 ; the length of the space occu- 

 pied by the three milk-molars is 0,023. Purchased, 1884. 



M. 2156. Part of the right ramus of the mandible of an immature 

 individual, containing mm . 4, m. 1, and m . 2 ; from the 

 Upper Eocene of Caylux. The length of mm. 4 is 0,009. 



Purchased, 1885. 



M. 1491. Anterior portion of the right ramus of the mandible of a 

 young individual, showing the three milk-molars ; from 

 the Upper Eocene of Caylux. The length of the space 

 occupied by the three teeth is 0,025, and the length of 

 m^TI 0,0085. Purchased, 1884. 



M. 1429 b. Fragment of the left ramus of the mandible of a species 

 of the present genus, showing mm . 3 and mm. 4 in an un- 

 worn condition ; from the Upper Eocene of Caylux. The 

 length of ^mT4 is 0,0096. Purchased, 1884. 



Bachitherium insigne, Filhol 1 . 

 Syn. Gelocus insignis, Filhol 2 . 



This species is referred to the present genus in the Ann. Soc. Sci. 

 Phys. Xat. Toulouse, 1882, p. 122, where the type specimens are 

 described, although not figured. The species is of larger size than 

 the last. In the absence of figures the following determinations 

 are provisional. 



Hab. France. 



M. 1424. Fragment of the left maxilla, containing the last four 

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

 Garonne), France. The length of the space occupied by 



1 Bull. Soc. Philom. Paris, ser. 6, vol. xii. p. 16 (1876, vol. dated 1877), 

 Gelocus. 



2 Loe. cit. 



