on pointing of sporting dogs, [97];
on expression of emotions, [103];
on psychogenesis of child, [123], [158];
on self-consciousness, [199];
on descent of man, [369], [370], [374-376], [380]
Dayak language. See [Language]
Deaf-mutes, sign-making by, [105-120];
ideation of, [149], [150], [339-341];
invention of articulate signs by, [122], [263], [367]
De Fravière on sign-making by bees, [90]