181 



modon vauclusianus, of which it is the type ; he considered 

 the three teeth as the three true molars. 



Bravard Collection. Purchased, 1852. 



M. 2160. Three fragments of the mandible, two of which show the 

 last milk-molar ; from the Upper Eocene of Caylux. 



Purchased, 1885. 



M. 2162. Cast of the right ramus of the mandible, showing the third 

 incisor, canine, and all the cheek-teeth. The locality of 

 the original is not known. Purchased, 1885. 



29513. The scapula; from the Upper Eocene of Montmartre. 



Hastings Collection. Purchased, 1855. 



29491. The anconeal joint ; from the Upper Eocene of Montmartre. 

 This specimen agrees with the specimens figured by De 

 Blainville, loc. cit. Hastings Collection. Purchased, 1855. 



29473. Two specimens of the calcaneum ; from the Upper Eocene 

 of Montmartre. These specimens are rather larger than 

 those figured by De Blainville. 



Hastings Collection. Purchased, 1855. 



Dichobunus robertianus, F. Geirais 1 . 

 This is a smaller species than the last. 

 Hob. France. 



44880 e. Part of the right ramus of the mandible, showing the 

 three true molars ; from the Upper Eocene of Montmartre. 

 This specimen agrees very closely with the mandible of 

 D. robertianus from the same locality figured by Gervais 

 in the Zool. et Pal. Franchises, 2nd ed. pi. xxxv. fig. 13 ; 

 and may, at least provisionally, be referred to the same 

 species. The length of the space occupied by the three 

 true molars is 0,0205, as against 0,0245 in I). leporinus 

 (No. M. 2165). Hastings Collection. Purchased, 1855. 



Genus ACOTHERULUM, P. Gervais 2 . 



The general form of the skull and teeth of the one known species 

 of this genus seems to indicate affinity with Dichobunus, but the 

 absence of the intermediate cusp on the hinder lobe of the upper true 

 molars, and the more completely bunodont structure of these teeth 

 apparently indicates affinity with Ceboch&rus and its allies. 



1 Zool. et Pal. Francises, 1st ed. vol. ii. Bxp. no. 35, p. 6 (1848-52). 



2 Comptes Kendus, vol. xxx. p. 604 (1850). 



