135 



PAL/EOSYOPS, Leidy. Pr. Ac. Nat. So., 1870, p. 113; 1871, pp. 114, n8, 197, 

 229 ; 1872, pp. 168, 241 ; U. S. Geol. Survey, 1870, p. 355 ; 1871, p, 358 ; 

 Cont. 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. Itevidens, 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. Journ. of Sc., vol. ii., p. 36. 



LIMNOHYUS, Leidy. Pr. Ac. Nat. Sc., 1872, p. 242 ; Cont. to Ext. Vert. Faun., 



p. 58 ; Marsh, Am. Journ. of Sc., 1872, 3d Ser. vol. iv., p. 124. 

 Z. laticeps. Marsh. Palccosyops laticeps. Am. Journ. Sc. jd Ser. vol. iv., p. 122. 

 Z. robustus, Marsh, loc. cit., p. 124, is same as P. major, Leidy. 

 Z. diaconus, Cope. U. S. Geol. Survey of Terrs., 1872, p. 593. 

 Z. fontinalis, Cope, loc. cit., 594. 



TELMATHERIUM, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p, 123. 

 T. validum, Marsh, loc. cit. 



LEUROCEPHALUS, gen. nov. This report, p. 42. 

 Z. 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. 



ZZ. agrarius, Leidy, loc. cit.; H. agrestis, U. S. Survey, 1871, p. 357. 



H. eximiits, 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. 



ZZ. 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. princcps, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 125. 



H. implicates, Cope. On Some Eocene Mammals, p. 5 ; U. S. Survey, 1872, 

 p 604. 



ZZ. crassidens, sp. nov. This report, p. 52. 



ZZ. imperialis, sp. nov. This report, p. 50. 



H. intermedius, sp. nov. This report, p. 51. 



ZZ paradoxus, sp. nov. This report, p. 53. 



HELALETES, Marsh. Am. Journ. of Sc., 3d Ser. vol. iv., p. 218. 

 ZZ hoops, Marsh, loc. cit. 

 H. latidens, sp. nov. This report, p. 54- 



