Gulick, 103.
Haeckel, 63, 71, 184.
Hæmoglobin, 22.
Hapalidæ, 160.
Harvey, 70.
Hawaiian Islands, 103; snails of, 104.
Heredity, 142; a real human process, 175; instinct determined by, 206; Anglo-Saxon, 213; of mental qualities, 232.
Heron, 44.
Hesperornis, 99.
Hippopotamus, 42.