218 TTNGULATA. 



and figured by Kowalevsky, op. cit. pi. xxxv. fig. 5 (to- 

 gether with the third metatarsal and the phalangeals). 

 In the description of the plate the specimen is erroneously 

 said to be from Brockenhurst, and is referred to the left 

 side. Hastings Collection. Purchased, 1855. 



30131. The proximal portion of the right third metatarsal; from 

 the Headon beds of Hordwell. 



Hastings Collection. Purchased, 1855. 



36789. The left third metatarsal ; from the Headon beds of Brock- 

 enhurst. Presented by S. Laing, Esq., 1862. 



30173. An atlas vertebra, provisionally referred to the present 

 species ; from the Headon beds of Hordwell. 



Hastings Collection. Purchased, 1855. 



Genus HYOPOTAMUS, Owen '. 



Syn. Ancodus, Pomel 2 . 



Jiothriodon, Aymard 3 . 



Cydoynathus, Croizet * (teste Kowalevsky). 



It has been shown by the present writer in the ' Palseontologia 

 Indica,' ser. 10, vol. ii. p. 162, that there is such a complete transition 

 in the characters of the upper molars from the brachydont type of 

 Anthracotfwrium to the typical hypsodont type of Hyopotamus that 

 no distinction can really be drawn between the two genera, although 

 the retention of the latter for the more hypsodont forms may, perhaps, 

 be convenient ; the teeth of H. porcinus noticed below fully confirm 

 this conclusion. The elongated pm. 3 of H. picteti indicates affinity 

 with Xiphodon. The metapodials are less stout than in Anthraco- 

 therium, and the third and fourth relatively smaller. 



Hyopotamus velaunus (Cuvier 5 ). 



Syn. Antkracotherium velaunum, Cuvier 6 . 

 Ancodus velaunus, Pomel 7 . 



1 Quart. Journ. Geol. Soc. vol. iv. p. 103 (1848), read 1847. 



2 Arch. Sci. Phys. Nat ser. 4, vol. viii. p. 324 (1848). 



8 Aim. Soc. Agric. Sci. le Puy, vol. xii. (1848) (teste P. Gervais). 



4 Not found. 



8 In Meyer's ' Palseologica,' p. 82 (1832). The name does not occur in the 

 ' Ossemens Fossiles,' 2nd ed. vol. v. pt. 2, p. 606 (1824). The synonymy is 

 taken from Filhol, in the Ann. Sci. Geol. vol. sii. art. 3, p. 189. A confusion 

 in this respect is noticed in the ' Palaeontologia Indica,' ser. 10, vol. ii. p. 166. 



6 Loc. cit. 7 Catalogue Methodique,' p. 92 (1858). 



