CATALOGUE 



OP 



FOSSIL MAMMALIA 



PART V. 



Ordinal Position Uncertain. 



Group TILLODONTIA. 



The sj'stematic position of the forms included in this group (e. g. 

 AncMppoclus,Psittacotherium^, Cahimodon, &c ) must be regarded as 

 unsettled. ]Marsh considers them as combining the characters of the 

 Ungnlata, Eodentia, and Carnivora ; they are classed by Cope - in 

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

 approximatiag to the Edentata. 



Family ANCHIPPODONTID.E. 



Genus ANCHIPPODUS, Leidy*. 

 Syn. TrogosKS, Leidy^. 



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

 therinm, Marsh® (woodcut, fig. 1), in which the dentition, according 

 to Marsh", is I. ~, C. \, Pm. % M. ~. The lower cheek-teeth resemble 



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



2 Yertebrata of the Tertiaries of the West (Rep. IT. S. Geol. Surv. Terr, 

 vol. iii.), Booki. p. 194 (18S4). 



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

 * Proc. Ac. Nal. Sei. Philad. 1868, p. 232. 

 ' Ibid. 1871, p. 115. 



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



"^ Op. cif. Tol. ix. p. 221 (1875). Cope (Yertebrata of the Tertiaries, &c., 

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

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

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



PART T. o :b 



