PALHZ ONTOLOGICAL APPENDIX—EXTINCT RODENTIA. 949 
HY DROCHGRID. 
HYDROCH@®RUS 2SOPI Leidy. 
Oromys wsopi LEIDY, Proc. Acad. Nat. Sci. Phila. 1853, 241. 
Hydrocherus wsopi LEIDy, Proc. Acad. Nat. Sci. Phila. 1856, 165; Holmes’s Post-pliocene Fossils of South 
Carolina, 1860, 112, pl. xxi, figs. 3-6; Journ. Acad» Nat. Sci. Phila. 2d ser. vii, 1869, 407. 
Described from teeth found in the Post-pliocene deposit of the Ashley River, 
near Charleston, South Carolina. 
GLIRES DUPLICIDENTATI. 
LEPORIDA. 
PALAOLAGUS HAYDENI Leidy. See anted, p. 373. 
PALHOLAGUS AGAPETILLUS Gore: See anted, p. 375. 
PALAOLAGUS TURGIDUS Cope. See antea, p. 375. 
PALA OLAGUS TRIPLEX Cope. See anted, p. 375. 
PANOLAX SANCTZFIDEI Cope. See anted, p. 376. 
PRAOTHERIUM PALATINUM Cope. See anted, p. 377. 
