2 ANCIIIPrODONTIDJE. 



those of Palceotherium. m. 3 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. 



Fig. 1. 



Tillotherium fodiens, Marsh. The skull ; from the Eocene of North America, 

 i. (After Marsh.) 



Anchippodus riparius, Leidy \ 



Syn. Trof/nsus castoridens, Leidy 2 . 

 Pal&osyops minor. Marsh 3 . 

 Anchippodus minor, Marsh. 4 . 



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. 



Hab. North America. 



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

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

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



1 Proc. Ac. Nat, Sci. Philad. 1868, p. 232. 

 a Ibid. 1871, p. 115. 



3 Airier. Jourh. ser. 3, vol. ii. p. 36 (1871). 



4 Ibid. vol. v. p. 485 (1873). 



