gill book

gill book

the respiratory organs of aquatic ARACHNIDS such as the king crab (Limulus). Such organisms possess numerous leaves (hence ‘book’) through which blood circulates and over which oxygenated water is circulated.
References in periodicals archive ?
Kathleen Watkins' children's book Pigin Of Howth will be published by Gill Books this October.
Gill Books' Nicki Howard said: "We are delighted Pigin will be the first children's character for Gill Books.