78 
HAROLD’S DISCUSSIONS. 
the land, but tlie whale is an instance of an animal 
returning to the water. Immense turtles, like the 
Fig. 46. —Megathere, eighteen feet long, from the Pleistocene 
beds of South America. 
glyptodon, lived in Central and South America after 
the manner of their race. This creature had a shell 
eight feet wide and seven feet high; its whole length 
was nearly twenty feet, and it must have weighed 
over a thousand pounds. In the seas swarmed great 
sharks whose jaws were set with four or five rows of 
