"Describes the animals of the Paleozoic Era, when animals with bony parts and the first land animals developed. Includes an Animal Families glossary, prehistory timeline, and pronunciation guides"-- Provided by publisher.

Includes index.

Timeline -- Paradoxides -- Orthoceras -- Diplograptus -- Cephalaspis -- Dunkleosteus -- Tiktaalik -- Ichthyostega -- Crassigyrinus -- Westlothiana -- Dimetrodon -- Lycaenops -- Estemmenosuchus -- Animal families.