Page:Popular Science Monthly Volume 90.djvu/675

 in Prehistoric Times Are Re-Created in Concrete

����The Plesiosaurus, a marine monster which inhabited the earth about ten million years ago. He possessed a serpent's neck, the head of a bird, the teeth of a crocodile, the ribs of a chameleon and the fins of a whale

���The Iguanodon, a dinosaur that reminds one of the kangaroo. Every bone of the monster's body has been found in Belgium and England and cast in plaster. The fore limbs were com- paratively small, the large three-toed hind limbs being chiefly used in walking and jumping

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