Chapter V: Birds of Old

Earliest birds, 70; wings, 71; study of young animals, 73; the
curious Hoactzin, 74; first intimation of birds, 76;
Archaeopteryx, 77; birds with teeth, 78; cretaceous birds, 79;
Hesperornis, 80; loss of power of flight, 81; covering of
Hesperornis, 82; attitude of Hesperornis, 83; curious position
of legs, 84; toothed birds disappointing, 85; early development
of birds, 86; eggs of early birds, 87; references, 88.