FIG. 76. Ganoid fishes Polypterus bilnr. 



i 



FIG. 77. Ganoid fishes American bony pike, Lepidosteus. 



FIG. 78. Bony- or food-fishes The Salmon. 



FIG. 79. Bony- or food-fishes The Common Eel. 



Photo : Underwood. 



