Lampreys: life without jaws.

Cardigan: Forrest Text (2011 second edition).
Octavo, paperback, 272 pp. black and white illustrations, maps.

A comprehensive study of this little known fish. Lampreys occupy a key position in our evolutionary story and can be grouped with a select number of animal species, commonly referred to as 'living fossils'. What makes it unique is the complete absence of the usual hinged vertebrate jaws and the way the mouth is surrounded by a circular disc or sucker.