CATALOGUE 



FOSSIL MAMMALIA, 



PART V. 



Ordinal Position Uncertain. 

 Group TILLODONTIA. 



The systematic position of the forms included in this group (e. g. 

 Anchippodus, PuittacotJierium 1 , Calamodon, &c ) must be regarded as 

 unsettled. Marsh considers them as combining the characters of the 

 Ungulata, Eodentia, and Carnivora ; they are classed by Cope 2 in 

 his Order Bunotheria ; while Schlosser 3 regards some of them as 

 approximating to the Edentata. 



Family ANCHIPPODONTID^S. 



Genus ANCHIPPODUS, Leidy 4 . 

 Syn. Trogosus, Leidy 5 . 



This genus appears closely allied to, if not identical with, Tillo- 

 therium, Marsh 6 (woodcut, fig. 1), in which the dentition, according 

 to Marsh 7 , is 1. f , C. \, Pm. |, M. ~. The lower cheek-teeth resemble 



Cope, Amer. Nat. vol. xvi, p. 157 (1882). 



Vertebrata of the Tertiaries of the West (Kep. U. S. Geol. Surv. Terr, 

 vo . iii.), Booki. p. 194 (1884). 



Morphol. Jahrb. vol. xii. p. 288 (1886). 



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



Ibid. 1871, p. 115. 



Amer. Journ. ser. 3, vol. v. p. 485 (1873). 



Op. cit. \ol. ix. p. 221 (1875). Cope (Vertebrata of the Tertiaries, &c., 

 p. 195), who regards the outermost cutting-tooth as an incisor, states that it is 

 absent in Tillotherium and present in Anchippodus, and that in the former there 

 are seven, and in the latter six lower cheek-teeth. 



?%p v. B 



