Chincliilla, Tetrastylus, JMegamys. 
laniger, p., Wagler, Isis, 1831, p. 614; Bolivia et Peru sept. 
Goldfuss, Atlas, pl. 290, fig. 1. in Montibus Audium. 
Var. major, Burm., 1879. » 
714. t Tetrastylus, Amegh., 1886. 
Megamys, p., Amogb., 1885. 
3861. laevigatus, Amegh., Bol. Ac. Cient. Cor- ■[■Oligocaen vel 
doba, 1885, p. 31; 1886, p. 44; Mam. Miocaen Argentina. 
Fosil., 1889, p. 209, 906, pl. 22, 26 et 80. 
? americanus (Brav.), Burm., Anal. Mus. » 
B.-A., III, p. 109 (Theridomys). 
3862. 'f diffusus, Amegh., Bol. Acad. Cord., 1886, Oligocaen vel 
p. 47; Mam. Fos., 1889, p. 210, 907, pl. 26, Miocaen Argentina. 
62, 82. 
3863.1 montanus, Am., Rev.Arg., 1881, p. 94, f Miocaen Argentina. 
fig. 21 — 23. 
argentinus, Burm. (Loxomylus). » 
715. t Megamys, Laurillard, 1848. 
Anoplotherium, p., Brav., Burm.; Nesodon, p., Owen; Potamarchus, 
p., Burm. 
3864.tpatagoniensis, LaurilL, in d’Orbigny, f Oligocaen vel 
Voy. Amer. Merid., Pal., 1848, p. 110; Miocaen Patagonia et 
Burm., Anal. Mus. B.-A., XIV, 1885, p. 98, Argentina. 
pl. II, III; Amegh., Mam. Fos., 1889, 
p. 194, 905, pl. 21, lig. 4- 8, et 80, 
fig. 5, 6. 
americanum, Brav., Burm. (Anoplothe- » 
rium), 1879. 
ovmus, Owen, Burm. (Nesodon), 1879. » 
3866. "f Laurillardi, Amegh., Bol. Ac. Cordoba, Oligocaen vel 
1883, p. 268; Mam. Fosil., 1889, p. 198, Miocaen xArgentina. 
905, pl. 21 et 22. 
3866.tdepressidens, Am., Bol. Ac. Cord., 1885, 
p. 28; Mam. Fos., 1889, p. 199, pl. 21 
et 26. 
f Oligocaen vel 
Miocaen Argentina. 
