Written when 'dinosaur' was still a new word in most homes: the American Museum's own guide to sea-serpents of Kansas, birds with teeth, and why great creatures vanish — with Charles R. Knight's famous restorations.

The Earliest Known Vertebrates

1 pages in this part of Animals of the Past.

The Earliest Known Vertebrates

"We are the ancients of the earth And in the morning of the times."

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