CONTENTS:- The coelomates; Phylum annelida; Class polychaeta; Class oligochaeta; Class Hirudinea; Phylum arthoropoda; Sub phylum onychophora; Sub phylum chelicerata; Sub phylum mandibulata; Sub phylum manidbulata; Sub phylum manidbulata; Phylum mollusca; Classes apacophora polyplacophora; and monoplacophora; Class gastropoda; Class pelecypoda; Class scaphopoda; Class cephalopoda.