PALSOTHEEHD^!. 45 



Genus ANCHITHERIUM, H. v. Meyer \ 



Including Mesohippus, Marsh 2 . 



Dentition : I. |, C. |, Pm. |, M. |. The upper premolars are as 

 complex as the true molars, the external surface of each lobe being 

 without a median ridge ; p m . 1 is comparatively small, and the third 

 lobe of m . 3 reduced to a small talon, while there is no infold to the 

 incisors. At least in A. bairdi there is a large lachrymal depression. 



Anchitherium aurelianense (Blainville 3 ). 



Syn. Palceotherium aurelianense, Blainville 4 . 

 Palceotherium hippoides, Blainville 5 . 



This is the largest species of the genus, and is elaborately de- 

 scribed by Kowalevsky in the Mem. Ac. Nat. Imp. St. Petersbourg, 

 ser. 7, vol. xx. (1873). There is no trace of the fifth metacarpal ; 

 and the meso- and ectocuneiform are separate. 



Hob. Europe. 



33553. Fragment of the right maxilla, with all the cheek-teeth 

 except pm- 2 ; from the Middle Miocene of Sansan (Gers), 

 France. Purchased, 1858. 



21836. Fragment of the right maxilla, with the last three premolars; 

 from Sansan. Croizet Collection. Purchased, 1848. 



29626. Cast of a portion of the left maxilla, showing the last four 

 cheek-teeth. The original is from Sansan, and is figured 

 in De Blainville's ' Osteographie,' Genus Palceotherium, 

 pi. vii. Hastings Collection. Purchased, 1855. 



33554-33556. Three fragments of maxillae, showing cheek-teeth in 

 a much-worn condition ; from Sansan. Purchased, 1858. 



40758. The second right upper premolar ; from Sansan. 



Presented by C. Falconer, Esq., 1867. 



21840. Two upper molars ; from Sansan. 



Croizet Collection. Purchased, 1848. 



M. 2281. Fragment of the right maxilla, containing pm. 2 and 

 pm. 3; from Sansan. Purchased, 1885. 



1 Neues Jahrb. 1844, p. 298. 



2 Amer. Journ. ser. 3, vol. ix. p. 248 (1875). 



3 Osteographie, Genus Palceotherium, p. 43 (1846), Palceotherium. 



4 Loc. cit. 5 Ibid. 



