Anchitherium.
_A._ (?)----. This report, p. 23.
Orohippus, Marsh. Am. Jour. of Sc., vol. iv., p. 207; vol. vii., p.
247.
_O. pumilus_, Marsh, loc. cit., 3d Ser. vol. iv., p. 207.
_O. agilis_, Marsh, loc. cit., 3d Ser. vol. v., p. 407.
_O. major_, Marsh, loc. cit., vol. 3d Ser. vii., p. 248.
_O. gracilis_, Marsh, loc. cit., 3d Ser. vol. vii., p. 249;
_Anchitherium gracile_ 3d Ser. vol. ii., p. 38.
_O. procyoninus_, Cope. Pr. Am. Phil. Soc., 1872, p. 466; U. S. Geol.
Survey, 1872, p. 606.
Palæosyops, Leidy. Pr. Ac. Nat. Sc., 1870, p. 113; 1871, pp. 114,
118, 197, 229; 1872, pp. 168, 241; U. S. Geol. Survey, 1870,
p. 355; 1871, p. 358; Com. to Ext. Vert. Faun., p. 27; Cope,
U. S. Geol. Survey of Terrs., 1872, p. 591.
_P. paludosus_, Leidy, loc. cit. Cont. to Ext. Vert. Faun., p. 28.
_P. major_, Leidy. U. S. Geol. Survey of Montana, 1871, p. 359; Pr.
Ac. Nat. Sc., 1872, pp. 168, 241; Cont. to Ext. Vert. Faun., p. 45.
_P. humilis_, Leidy. Pr. Ac. Nat. Sc., 1872, p. 168, 277; Cont. to
Ext. Vert. Faun., p. 58.
_P. junius_, Leidy. Pr. Ac. Nat. Sc., 1872, p. 277; Cont. to Ext.
Vert. Faun., p. 57.
_P. lævidens_, Cope. Pr. Am. Phil. Soc., 1873; U. S. Survey, 1872, p.
591.
_P. vallidens_, Cope. Pr. Am. Phil. Soc., 1872, p. 487; loc. cit., p.
592.
_P. minor_, Marsh. Am. Jour. of Sc., vol. ii., p. 36.
Limnohyus, Leidy. Pr. Ac. Nat. Sc., 1872, p. 242; Cont. to Ext.
Vert. Faun., p. 58; Marsh, Am. Jour. of Sc., 1872, 3d Ser.
vol. iv., p. 124.
_L. laticeps_, Marsh. _Palæosyops laticeps_. Am. Journ. Sc. 3d Ser.
vol. iv., p. 122.
_L. robustus_, Marsh, loc. cit., p. 124, is same as _P. major_, Leidy.
_L. diaconus_, Cope. U. S. Geol. Survey of Terrs., 1872, p. 593.
_L. fontinalis_, Cope, loc. cit., p. 594.
Telmatherium, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 123.
_T. validum_, Marsh, loc. cit.
Leurocephalus, gen. nov. This report, p. 42.
_L. cultridens_, sp. nov. This report, p. 42.
Hyrachyus, Leidy. Pr. Ac. Nat. Sc., 1871, p. 229; 1872, pp. 19,
163; U. S. Geol. Survey, 1871, p. 360; Cont. to Ext. Vert.
Faun., p. 60.
_H. agrarius_, Leidy, loc. cit.; _H. agrestis_. U. S. Survey, 1871,
p. 357.
_H. eximius_, Leidy. Pr. Ac. Nat. Sc., 1871, p. 229; 1872, p. 163; U.
S. Geol. Survey of Terrs., 1871, p. 361; Cont. to Ext. Vert. Faun.,
p. 66; Cope, U. S. Geol. Survey of Terrs., 1872, p. 595.
_H. modestus_, Leidy. Pr. Ac. Nat. Sc., 1872, p. 20; U. S. Geol.
Survey of Terrs., 1871, p. 361; Cont. to Ext. Vert. Faun., p. 67;
_Lophiodon modestus_, Pr. Ac. Nat. Sc., 1870. p. 109.
_H. nanus_, Leidy. Pr. Ac. Nat. Sc., 3d Ser. 1872, p. 20; U. S.
Survey, 1871, p. 361; Cont. to Ext. Vert. Faun., p. 67.
_H. princeps_, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 125.
_H. implicatus_, Cope. On Some Eocene Mammals, p. 5; U. S. Survey,
1872, p. 604.
_H. crassidens_, sp. nov. This report, p. 52.
_H. imperialis_, sp. nov. This report, p. 50.
_H. intermedius_, sp. nov. This report, p. 51.
_H. paradoxus_, sp. nov. This report, p. 53.
Helaletes, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 218.
_H. boöps_, Marsh, loc. cit.
_H. latidens_, sp. nov. This report, p. 54.
Lophiodon.
_L bairdianus_, Marsh. Am. Jour. of Sc., 3d Ser. vol. ii., p. 36.
_L. affinis_, loc. cit., p. 37.
_L. nanus_, loc. cit.
_L. pumilus_, loc. cit., p. 38.
Lophiotherium.
_L. sylvaticum_, Leidy. Pr. Ac. Nat. Sc., 1870, p. 126; Cont. to Ext.
Vert. Faun., p. 69.
_L. Ballardi_, Marsh. Am. Jour. of Sc., 3d Ser. vol. ii., p. 39.
Orotherium, Marsh. Am: Jour. of Sc., 3d Ser. vol. iv., p. 217.
_O. mintanum_, Marsh, loc. cit.
Helohyus, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 207.
_H. plicodon_, Marsh, loc. cit.
Thinotherium, Marsh. Am. Jour. of Sc., 3d Ser. vol. iv., p. 208.
_T. validum_, Marsh, loc. cit.