582 MANUAL OF NATURAL HISTORY. 



sub-apennine stage of Auvergne, and a fossil genus 

 of Camelidce, the Merycotherium, from the glacial 

 regions of Siberia. Besides these, we have the ex- 

 tinct pachydermatous genera Potamohippus, Chce- 

 roiherium, and Elasmotherium, from the sub-apen- 

 nine or newer tertiary deposits of Asia, and the 

 Toxodon, from the Pampas of South America. In 

 the vast alluvial plains of South America, colossal 

 edentate mammals have been floated from the in- 

 terior of the country in a former age, and embedded 

 in the muddy deposits. Among these are the gigan- 

 tic fossil Sloth (Mylodon robustum), eleven feet in 

 length, which uprooted trees with its fore-feet, and 

 fed upon the foliage ; here are also the remains of 

 a gigantic Armadillo (Glyptodon clavipes) covered 

 with a huge, tessellated shield; and the colossal 

 Megatherium, larger than a Rhinoceros, with im- 

 mense hind legs, on which the monster rested while 

 rooting up the trees with the strong claws of the 

 fore-legs. From the Pampas of Buenos Ayres we 

 also have the Glossotherium, an extinct genus al- 

 lied to the Ant-eaters. Besides the huge Glypto- 

 don, these plains furnish us with several other 

 extinct Armadillo-forms, as Chlamydotherium, Eu- 

 ryodon, Hoplophorus, and Pacfiytherium. From 

 the sub-apennine stage of the Pampas, and from 

 the caverns of Brazil, the remains of Platyonyx, 

 Scelidotherium, and Sphenodon, of the family Me- 

 gatheriidce, are collected. The fossil Rodent Lon- 

 chophorus, and the Leptotlierium, an extinct genus 

 of Bovidce, are also from the same locality. 



