145 
the western territories. Washington, 1973. Pag. 60. Pl. 
II, 11. 12. IV, 9—18. XX, 25 und 26. 
Cope. On the extinct vertebrate of the Eocen of Wyoming, 
6. Annual Report of the United States Geological Survey, 
by Hayden. Washington 1873. 
Gaudry, Les Enchainements ete. pg. 65. fig. 73. 
Syn.: Hyrach. agrestis, Leidy. 
Lophiodon Bairdianus, Marsh. 
Hyr. ezimius, Leidy. Bridger Eocän von Wyoming. 
'Leidy, Contributions ete. Pag. 66. Pl. IV., 19. 20. XIX. 
5. XXVI], 9. 10. 
Cope, On the extinct vert. of Wyoming ete. 
Hyr. modestus, Leidy. Bridger Eocän von Wyoming. 
Leidy, Contributions ete. Pag. 67. Pl.Il. fig. 13. 
Syn.: Lophiodon modestus, Leidy. 
Hyr. nanus, Marsh. Bridger Eocän von Wyoming. 
Leidy, Contributions ete. Pag. 67. Pl. II, 14., VI, 42. XXVl. 
IE XXVI 28. 22 
Cope, On the extinct vert. of Wyoming. 
Syn.: Lophiodon nanus, Marsh. 
Helaletes nanus, Marsh. 
Hyr. princeps, Marsh. Bridger Eocän von Wyoming. 
Cope, On the extinct vertebrate of Wyoming. 
Marsh, Preliminary description of new tertiary mammals. 
Amer. Journ. Sc. and Arts. Vol. IV. 1872. pg. 5. 
Hyr. implicatus, Cope, Bridger Eocän von Wyoming. 
Cope, On the extinet vertebrate of Wyoming. 
Marsh, Preliminary deseription of new tertiary mammals. 
Amer. Journ. Se. and-Arts. Vol. IV. 1872. pg. 27. 
Syn.: Helaletes boops, Marsh. 
Hyr. singularis, C o pe. Eocän von New-Mexico in Nord-Amerika. 
Cope, Eocene Vertebrate, Geol. Exeurs. and Survey west 
of the 100th Meridian, 1875. pg. 19. . 
Cope, Wheelers Report. Washington, 1875. pg: 9. 
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