Hyelaphus porcinus.
Hygrogonus.
Hyla, singing species of.
Hylobates, absence of the thumb in; upright progression of some species of; maternal affection in a; direction of the hair on the arms of species of; females of, less hairy below than males.
Hylobates agilis, hair on the arms of; musical voice of the; superciliary ridge of; voice of.
Hylobates hoolock, sexual difference of colour in.
Hylobates lar, hair on the arms of; female less hairy.
Hylobates leuciscus, song of.
Hylobates syndactylus, laryngeal sac of.
Hylophila prasinana.