256 TJNGULATA. 



agrees so exactly with the cranium No. 34961 a, that there 

 is every probability of its belonging to the same species ; 

 this being rendered well-nigh certain by its agreement 

 with No. 28059. The length of the space occupied by 

 the three true molars is 0,042. In the specimen figured 

 by Gervais in the Zool. et Pal. Franchises, 2nd ed. 

 pi. xxxiii. fig. 2 a, under the name of P. typus, the corre- 

 sponding length is only 0,035, indicating the probability 

 of its specific distinctness. 



Bravard Collection. Purchased, 1852. 



28059. Cast of a fragment of the right ramus of the mandible, con- 

 taining the much-worn m . 2 and m . 3. The original is 

 from La Moliere (? Tarn-et-G-aronne). The length of the 

 space occupied by the two teeth is 0,034 ; the correspond- 

 ing space in No. 34961 b being 0,032. 



Presented by John Brown, Esq., 1852. 



JVC. 2200. A second and third lower true molar, agreeing almost 

 precisely with those of 34961 b, and provisionally referred 

 to the same species ; from the Upper Eocene of Caylux 

 (Tarn-et-Garonne). These teeth are apparently identical 

 with those of the mandible from the same deposits figured 

 by Filhol in the Ann. Sci. Geol. vol. viii. pi. xiv. fig. 292, 

 under the name of Choeromorus simplex. 



Purchased, 1885. 



27805. Fragment of the right ramus of the mandible, with the 

 unworn m . 2 and m. 3, perhaps belonging to a small indi- 

 vidual of the present species ; from the Lower Miocene of 

 Antoign (Puy-de-D6me). 



Croizet Collection. Purchased, 1848. 



M. 2202. Fragment of the left ramus of a mandible of a young 

 animal, provisionally referred to this species ; from the 

 Upper Eocene of Caylux. This specimen shows mm. 4 

 (length 0,0165), the broken base of m . 1, and the germ of 

 m. 2 detached from its alveolus. Purchased, 1885. 



Hyotherium waterhousei (Pomel 1 ). 



Syn. Palceochatrus waterhousei, Pomel 2 . 



This species is considerably larger than the last, but the structure 

 of the molars is very similar. 

 Hab. France. 



1 Catalogue Methodique, p. 86 (1853), Palaochcerus. 2 Loc. cit. 



