132 



Hyopsodus, Leidy. Pr. Ac. Nat. Sc, 1870, p. no ; U. S. Survey of Terrs., 

 1870, p. 354; do. 1871, p. 362 ; Cont. to Ext. Vert. Faun., p. 75. 



H. paulus, Leidy, loc. cit. 



H. minusculus, Leidy. Cont. to Ext. Vert. Faun., p. 81. 



H. gracilis. Marsh. Am. Journ. ofSci.,vol. ii., p. 42. 



H. vicarius. Cope. Described in U. S. Survey of Terrs., 1872, p. 6og, as 

 Microsyops vicarius. Wheeler's Survey, vol. iv., pt. ii., p. 150. 



MiCROSYOPS, Leidy. Pr. Ac. Nat. Sc, 1872, p. 20 ; U. S. Survey of Terrs., 1871, 

 p. 363 ; Cont. to Ext. Vert. Faun., p. 82. 

 M. gracilis, Leidy, loc. cit. In the " Contributions," Dr. Leidy, considering 

 Limnoiheritim, Marsh, as a synonym of Microsyops, has called this species 

 AT. elegans. 



HiPPOSYUS, Leidy. Pr. Ac. Nat. Sc, 1872, p. 37 ; Cont. to Ext. Vert. Faun., 

 p. 90. 



H. formosus, Leidy, loc. cit. 



H. 7-obustior, Leid}^ Cont. to Ext. Vert. Faun., p. 93 ; Notharctus robustior. 

 U. S. Geol. Survey of Terrs., 1S71, p. 364. 



Antiacodon, Marsh. Am. Journ. of Sci., 3d Ser. vol. iv., p. 210. 



A. vennstiis. Marsh, loc. cit. 



Bathrodon, Marsh. Am. Journ. of Sci., 3d Ser. vol. iv., p. 211. 



B. iypits. Marsh, loc. cit. 



Lemuravus, Marsh. Am. Journ. of Sci., 3d Ser. vol. ix., p. 239. 

 L. disiaiis, Marsh, loc. cit. 



LiMNOTHERiUM, Marsh. Am. Journ. of Sci., 3d Ser. vol. ii., p. 43. 

 L. iy7-aniuis. 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. speciosjts. Marsh, loc. cit. 



Pal^acodon, Leidy. Pr. Ac. Nat. Sc, 1872 ; p. 21 U. S. Geol. Survey of 

 Terrs., 1871, p. 356 ; Cont. to Ext. Vert. F;iun., p. 122. 

 P. verus, Leidy, loc. cit. 

 P. vagtis. Marsh. Am. Journ. of Sc, 3d Ser. vol. iv., p. 224. 



Telmatolestes, Marsh. Am. Journ. 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. rostratu/n. Cope, loc. cit. ; U. S. Survey, 1872, p. 548. 



Anaptomorphus, Cope. Pr. Am. Phil. Soc, 1S72, p. 554; U. S. Geol. Survey 

 of Terrs., 1872, p. 549. 



A. cemulus, Cope, loc. cit. 



