138 



RODENTIA. 



PARAMYS, Leidy. Pr. Ac. Nat. Sc., 1871, p. 231 ; U. S. Geol. Survey, 1871, p. 



357 ; Cont. to Ext. Vert. Faun., p. no. 

 P. delicatus, Leidy, loc. cit. 

 P. delicatior, Leidy, loc. cit. 



P. delicatissimus, Leidy, loc. cit.; Cont. to Ext. Vert. Faun., p. in. 

 P. robustus, Marsh. Am. Jour, of Sc., 3d Ser. vol. iv., p. 218, 

 P. superbus, sp. nov. This report, p. 84. 

 P. leptodus, Cope. U. S. Geol. Survey, 1872, p. 609. 



MYSOPS, Leidy. Pr. Ac. Nat. Sc., 1871, p. 232 ; U. S. Geol. Survey, 1871, p. 



357 ; Con.t to Ext. Vert. Faun., p. in. 

 M. minimus, Leidy, loc. cit. 

 M. fraternus, Leidy. Cont. to Ext. Vert. Faun., p. 112. 



PSEUDOTOMUS, Cope. Pr. Am. Phil. Soc., 1872, p. 467 ; U. S. Geol. Survey, 



1872, p. 610. 

 P. hians, Cope, loc. cit. 



ARCTOMYS, Marsh. Am. Jour, of Sc., 3d Ser. vol. ii., p. 121. 

 A. vetus, Marsh, loc. cit. 



GEOMYS, Marsh. Am. Jour, of Sc., 3d Ser. vol. ii., p. 121. 

 G. bisulcatus, Marsh, loc. cit. 



SCIURAVUS, Marsh. Am. Jour, of Sc., 3d Ser. vol. ii., p. 122. 

 S. nitidus, Marsh, loc. cit. 

 S. undans, Marsh, loc. cit. 

 S. parvidens, Marsh, loc. cit., 3d Ser. vol. iv., p. 220. 



TILLOMYS, Marsh. Am. Jour, of Sc., 3d Ser. vol. iv., p. 219. 

 T. senex, Marsh, loc. cit. 

 T. paruus, Marsh, loc. cit. 



TACHYMYS, Marsh. Am. Jour, of Sc., 3d Ser. vol. iv., p. 219. 

 T. lucaris, Marsh, loc. cit. 



COLONYMYS, Marsh. Am. Jour, of Sc., 3d Ser. vol. iv., p. 220. 

 C. celer, Marsh, loc. cit. 



INSECTIVORA. 



OMOMYS, Leidy. Pr. Ac. Nat. Sc., 1869, p. 63 ; Ext. Mam. of N. Am., p. 408 ; 

 Cont. to Ext. Vert. Faun., p. 120. 

 0. Carteri, Leidy, loc. cit. 



WASHAKIUS, Leidy. Cont. to. Ext. Vert. Faun., p. 123. 

 W. insignis, Leidy, loc. cit. 



PASSALACODON, Marsh. Am. Jour, of Sc., vol. iv. p. 208. 

 P. litoralis, Marsh, loc. cit. 



