159 pages, Col photos, b/w photos, illus
Describes the evolution, natural history and biology of the ammonite, and also covers taxonomy. An ammonite is a cephalopod which once swam in shallow marine seas and became extinct at the end of the Cretaceous period (65 million years ago). Its closest living relative is the chambered nautilus. Its ability to swim was due to the unique construction of its shell, which contained many air filled chambers, called the phragmocone, in one of which the ammonite lived.
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