Lemuravus, Marsh. Am. Journ. of Sci., 3d Ser. vol. ix., p. 239. _L. distans_, Marsh, loc. cit. Limnotherium, Marsh. Am. Journ. of Sci., 3d Ser. vol. ii., p. 43. _L. tyrannus_, Marsh, loc. cit. _L. elegans_, Marsh, loc. cit. _L. affine_, Marsh. Am Journ. of Sci., 3d Ser. vol. iv., p. 207. Mesacodon, Marsh. Am. Journ. of Sci., 3d Ser. vol. iv., p. 212. _M. speciosus_, Marsh, loc. cit. Palæacodon, Leidy. Pr. Ac. Nat. Sc., 1872; p. 21. U. S. Geol. Survey of Terrs., 1871, p. 356; Cont. to Ext. Vert. Faun., p. 122. _P. verus_, Leidy, loc. cit. _P. vagus_, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 224. Telmatolestes, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 206. _T. crassus_, Marsh, loc. cit. Tomitherium, Cope. Pr. Am. Phil. Soc., 1872, p. 470; U. S. Geol. Survey of Terrs., 1872, p. 546; Wheeler's Survey, vol. iv., p. 135, pt. ii. _T. rostratum_, Cope, loc. cit.; U. S. Survey, 1872, p. 548. Anaptomorphus, Cope. Pr. Am. Phil. Soc., 1872, p. 554; U. S. Geol. Survey of Terrs., 1872, p. 549. _A. æmulus_, Cope, loc. cit. Oligotomus, Cope. On some Eocene mammals, p. 2; U. S. Geol. Survey of Terrs., 1872, p. 607. _O. cinctus_, Cope, loc. cit. Opisthotomus, Cope. Wheeler's Survey, vol. iv., p. 151, pt. ii. _O. astutus_, loc. cit., p. 152. Pantolestes, Cope. Pr. Am. Phil. Soc., 1872, p. 467; Wheeler's Survey, v. iv., pt. ii., p. 145. _P. longicaudus_. Pr. Am. Phil. Soc., 1872, p. 467; _Notharctus longicaudus_, U. S. Geol. Survey of Terrs., 1872, p. 549. Sarcolemur, Cope. Pr. Ac. Nat. Sc., 1875, p. 256; Wheeler's Survey, v. iv., pt. ii., p. 147. _S. pygmæus_, Cope. _Lophiotherium pygmæus_, Pr. Am. Phil. Soc., 1872, extras July 20; _Antiacodon pygmæus_, U. S. Geol. Survey of Terrs., 1872, p. 607; _Hyopsodus pygmæus_, Pr. Am. Phil. Soc., 1872, p. 461. _S. furcatus_, Cope. _Antiacodon furcatus_. On some Eocene mammals, p. i.; U. S. Geol. Survey of Terrs., 1872, p. 608. Thinolestes, Marsh. Am. Journ. Sc., 3d Ser. vol. iv., p. 205. _T. anceps_, Marsh, loc. cit. CARNIVORA. Uintacyon, Leidy. Pr. Ac. Nat. Sc., 1872, p. 277; Cont. to Ext. Vert. Faun., p. 118. _U. edax_, Leidy, loc. cit. _U. vorax_, Leidy, loc. cit. Cont. to Ext. Vert. Faun., p. 120. Sinopa, Leidy. Pr. Ac. Nat. Sc., 1871, p. 115; U. S. Geol. Survey of Terrs., 1871, p. 355; Cont. to Ext. Vert. Faun., p. 116. _S. rapax_, Leidy, loc. cit. _S. eximia_, Leidy. Cont. to Ext. Vert. Faun., p. 118. Canis. _C. montanus_, Marsh. Am. Jour. of Sc., 3d Ser. vol. ii., p. 123. Dromocyon, Marsh. Am. Jour. of Sc., 3d Ser. vol. xii., p. 403. _D. vorax_, Marsh, loc. cit. Harpalodon, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 216. _H. sylvestris_, Marsh, loc cit. _H. vulpinus_, Marsh, loc. cit., p. 217. Limnocyon, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 126. _L. verus_, Marsh, loc. cit. _L. riparius_, Marsh, loc. cit., p. 203.