PART III: EDENTATA, MEGALONYCHIDJE—MEGATHERIIDE. 819 
Name, authority, and date. Type or included species, and localities. 
T Stenocephalus MERCERAT, 1891..... Stenocephalus australis, S. cognatas, S. hybridus, 
Rio Santa Cruz, Patagonia. 
Tapinotherium MERncERAaT, 1891 ..... Tapinotherium aguirrei, Monte Leon, Patagonia. 
Uranokyrtus AMEGHINO, 1894 ....... Uranokyrtus bombifrons, Patagonia. 
Xyophorus AMEGHINO, 1887 ........ Xyophorus rostratus, X. simus, 8. Patagonia. 
MEGATHERIIDZE. 
(Including Mylodontidee of ZrrTEL. ) 
FAMILIES AND SUBFAMILIES. 
Lestodontidae AMEGHINO, 1889. Nematheridae AMEGHINO, 1891. 
Megatheriade © Gray, 1821. Scelidotheridae AMEGHINO, 1889. 
Mylodontinae Gruu, 1872. 
Mylodontidae AMEGHINO, 1889. 
GENERA AND SUBGENERA. 
Name, authority, and date. Type or included species, and localities. 
Ammotherium AMEGHINO, 1891...... Ammotherium profundatum, southern Patagonia. 
Analcitherium AMEGHINO, 1891...... Analcitherium antarcticum, southern Patagonia. 
Callistrophus WAGNER, 1860 ........ Callistrophus priseus, Mt. Chimborazo, Ecuador. 
Catonyx AMEGHINO, 1891........... New name for Platyonyx Lund, 1840. 
1iCalodon UND 183822255 -255-—- 5 Celodon maquinense, Bone caves, Brazil. (See 
Nothrotherium and Hypocoelus. ) 
Diodomus AMEGHINO, 1885 ......... Diodomus copei, Paraná, Argentina. 
Essonodontherium AMEGHINO, 1884... Megatherium gervaisi, Rio Salado, Argentina. 
Hibradys Wri y. 8092 esce Eubradys antiquus, Ashley River, S. C. 
Glossotherium OwEN, 1840 .......... Glossotherium darwini, Rio Sarandis, Uruguay. 
Grypotherium REINHARDT, 1879..... Mylodon darwini, Punta Alta, Patagonia. 
Hebetotherium AMEGHINO, 1898...... Hebetotherium silenum, La Plata, Argentina. 
{| Hypocoelus AMEGHINO, 1891 ....... New name for Celodon Lund, 1838. (See Noth- 
rotherium. ) 
Interodon AMEGHINO, 1885.......... Interodon crassidens, Paraná, Argentina. 
Laniodon AMEGHINO, 1881.......... Laniodon robustus, Argentina. 
Lestodon GERVAIS, 1855 ............ Lestodon armatus (type), Province of Buenos 
Aires, Argentina; L. myloides, Argentina? 
Inmodon AMEGHINO, 1891.......... Lymodon auca, L. perfectus, southern Patagonia. 
Megatherium G. Cuvier, 1796....... Megatherium americanum, Rio Lujan, Argentina. 
T-Mesodon AMEGHINO, 1882.......... Mesodon zeballosi, Province of Buenos Aires, 
Argentina. 
Mylodon Owen, 1840..-.....-...... Mylodon harlani (type), Big Bone Lick, Ken- 
tucky; M. darwinii, Bahia Blanca, Patagonia. 
Nematherium AMEGHINO, 1887 ...... Nematherium angulatum, N. sinuatum, southern 
Patagonia. 
Neomylodon AMEGHINO, 1898 ....... Neomylodon listai, southern Patagonia. 
Neoracanthus AMEGHINO, May, 1889. New name for Oracanthus Ameghino, 1885. 
Nephotherium AMEGHINO, 1886 ...... Mylodon (?) ambiguus, Paraná, Argentina. 
Nothrotherium LYDEKKER, 1889 ..... New name for Celodon Lund, 1838. 
Ocnobates Corr, Aug., 1889......... New name for Oracanthus Ameghino, 1885. 
(See Neoracanthus. ) 
Ocnopus REINHARDT, 1875.......... Megatherium laurillardii, Lagoa Santa, Brazil. 
Octodontotherium AMEGHINO, 1895... Octodontotherium grandx, Pyrotherium beds, 
Patagonia. 


« Megatheriide OWEN, 1843, 
