134 



OREOCYON, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 406 

 O. latidens, Marsh, loc. cit. 



THINOCYON, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 204. 

 T. velox, Marsh, loc. cit. 



VIVERRAVUS, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 127. 

 V. gracilis, Marsh, loc. cit. 

 V. (?) nitidus, Marsh, loc. cit., p. 205. 



ZIPHACODON, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 216. 

 Z. rugatus, Marsh, loc. cit. 



VULPAVUS, Marsh. Am. Journ. of Sc., 3d Ser. vol. ii., p. 124. 

 V. palustri s, Marsh, loc. cit. 



MIACIS, Cope. Pr. Am. Phil. Soc., 1872, p. 470. 



M. parvivorus, loc. cit. ; Viveravus parvivorus, U. S. Geol. Survey of Terrs., 

 1872, p. 560. 



MESONYX, Cope. Pr. Am. Phil. Soc., 1872. p. 460; U S. Geol. Survey of 



Terrs., 1872, p. 550. 

 M. obtusidens, Cope, loc. cit. U. S. Survey, p. 552. 



SYNOPLOTHERIUM, Cope. Pr. Am. Phil. Soc., 1872, p. 483 ; U. S. Geol. Survey 

 of Terrs., 1872, p. 554. 

 S. lanius, Cope, loc. cit. U. S. Survey, p. 557. 



STYPOLOPHUS, Cope. Pr. Am. Phil. Soc., 1872, p. 466 ; U. S. Geol. Survey of 

 Terrs., 1872, p. 559 ; Wheeler's Survey, vol. iv., p. log. 



S. insectivorus, Cope. Pr. Phil. Soc., 1872, p. 469 ; U. S. Survey, 1872, p. 557. 

 S. pungent, Cope, loc. cit., pp. 466, 559. 

 S. brevicalcaratus, Cope, loc. cit., pp. 469, 560. 



MEGENCEPHALON, gen. nov. This report, p 20. 

 M. primcevus, sp. nov. This report, p. 20. 



UNGU LATA. 



PERISSODACTYLA. 



ANCHITHERIUM. 



A. (?) . This report, p. 23. 



OROHIPPUS, Marsh. Am. Journ. of Sc., vol. iv., p. 207 ; vol. vii., p. 247. 



O. pumilus, Marsh, loc. cit., 3d Ser. vol. iv., p. 207. 



0. agilis, Marsh, loc. cit., 3d Ser. vol. v., p. 407. 



0. major, Marsh, loc. cit., vol. 3d Ser. vii., p. 248. 



O. gracilis, Marsh, loc. cit., 3d Ser. vol. vii., p. 249 ; Anchitheriuni qmci/.'< 

 3d Ser. vol. ii., p. 38. 



O.procyoninus, Cope. Pr. Am. Phil. Soc., 1872, p. 466; U. S. Survey, 1872, 

 p. 606. 



