ANCHIPPODONTID^. 



those of PaTceotlierium, '^^^ having a large third lobe ; the inner 

 incisors are very small, and the second pair large and rodent-like ; 

 there is a small diastema. The skeleton approaches that of the 

 primitive Carnivora. 



I^ig. 1. 



Tillotherium fodiens, Marsh.- 



-Tbe skull ; from the Eocene of North America. 

 :. (After Marsh.) 



Anchippodus riparius, Leidy^ 



Syn. Trocjnsus castoridens, Leidy^. 

 Palceosyops minor, Marsh ^. 

 Anchippodus minor, Marsh ^, 



This is the type species ; the writer follows Leidy in regarding 

 the form to which the three names quoted as synonyms have been 

 applied as specifically the same. 



Hah, North America. 



47503. Cast of a lower true molar. The original was obtained from 

 the Eocene of Monmouth County, New Jersey, U.8.A., 

 and is the type of the genus; it is described and figured 



' Proc. Ac. Nat. Sci. Philad. 18G8, p. 232. 

 2 Ibid. 1871, p. 115. 



'^ Aviwv. Journ. ser. 3, vol. ii. p. 3G (1871). 

 * Ibid. vol. V. p. 48.5 (1873). 



