Contents: Hemichordata, Tunicata, Tunicata (Contd.), Cephalochordata, The Systematic Position and Classification of Fishes, External Characters of Cyclostomata and of Fishes, The Skin and Scales, The Skeleton, The Dentition, Alimentary Canal and Digestive Glands, The Respiratory Organs, The Air?Bladder, The Vascular System, The Lymphatics and The Blood?Glands, Muscular System, Nervous System and Organs of Special Sense, The Kidneys and the Reproductive Organs, Cyclostomata (Systematic), Elasmobranchii, Teleostomi, Dipneusti, Appendix to the Fishes, Teleostei, Teleostei (Contd.)