CONTENTS:- Preface; Introduction; Kingdom of Organism; Phylum Protozoa; Sarcodina; Mastigophora; Ciliophora; Sporozoa; Class suctoria; Sub kingdom metazoa; Branch parazoa; Phylum coelenterata; Sub phylum cnidaria; Class scyphozoa; Class actionzoa; Phylum ctenophora; The triplopbastic animals; Superphylum acoelomata; Modes of animal life; Class trematoda; Phylum plathyhelminthes; Phylum nemertina; The pseudcoelomates; Phylum aschelminthes; Class nematode.