32 



WHAT MR. DARWIN SAW. 



ARGENTINE REPUBLIC. 



FOSSIL REMAINS OF A MEGATHERIUM. 



horses, and hollow-horned ruminants migrated, on land since 

 submerged near Behring's Straits, from Siberia into North 

 America, and thence, on land since submerged in the West 



FOSSIL REMAINS OF AN ELEPHANT. 



