Persians, [419]

Peruvians, [67], [85]

Physiological characters, functions of nutrition and assimilation, respiration and circulation, reproduction, etc., [105]–[120]

Pictography, [137]–[140]

Pigmentation, race variations of, [46]; ten principal shades of colour of skin, [47]; pigmentation of the iris, [48]; three fundamental shades of the iris, [49]; colour of the eye in different races, [49]; colouring of the hair, [49]; four principal shades, [49]; pigmentation at birth, [50]; absence of pigment, [51]

Pigmies, [455]

Pimas, [535]

Pithecanthropus erectus, [360]

Politeness, rules of.—“Exchanging blood,” salutations, etc., [254]–[255]

Polyandry, [235]