Polydactylism in man.
Polygamy, influence of, upon sexual selection; superinduced by domestication; supposed increase of female births by. In the stickleback.
Polygenists.
Polynesia, prevalence of infanticide in.
Polynesians, wide geographical range of; difference of stature among the; crosses of; variability of; heterogeneity of the; aversion of, to hairs on the face.
Polyplectron, number of spurs in; display of plumage by the male; gradation of characters in; female of.
Polyplectron chinquis.
Polyplectron Hardwickii.
Polyplectron malaccense.
Polyplectron Napoleonis.
Polyzoa.
Pomotis.
Pontoporeia affinis.
Porcupine, mute, except in the rutting season.
Pores, excretory, numerical relation of, to the hairs in sheep.
Porpitae, bright colours of some.
Portax picta, dorsal crest and throat-tuft of; sexual differences of colour in.
Portunus puber, pugnacity of.
Potamochoerus pencillatus, tusks and facial knobs of the.
Pouchet, G., the relation of instinct to intelligence; on the instincts of ants; on the caves of Abou-Simbel; on the immunity of negroes from yellow fever; change of colour in fishes.
Pouter pigeon, late development of the large crop in.
Powell, Dr., on stridulation.
Power, Dr., on the different colours of the sexes in a species of Squilla.
Powys, Mr., on the habits of the chaffinch in Corfu.
Pre-eminence of man.
Preference for males by female birds; shewn by mammals, in pairing.
Prehensile organs.
Presbytis entellus, fighting of the male.
Preyer, Dr., on function of shell of ear; on supernumerary mammae in women.
Prichard, on the difference of stature among the Polynesians; on the connection between the breadth of the skull in the Mongolians and the perfection of their senses; on the capacity of British skulls of different ages; on the flattened heads of the Colombian savages; on Siamese notions of beauty; on the beardlessness of the Siamese; on the deformation of the head among American tribes and the natives of Arakhan.
Primary sexual organs.
Primates, sexual differences of colour in.
Primogeniture, evils of.
Prionidae, difference of the sexes in colour.
Proctotretus multimaculatus.
Proctotretus tenuis, sexual difference in the colour of.
Profligacy.
Progenitors, early, of man.
Progress, not the normal rule in human society; elements of.
Prong-horn antelope, horns of.
Proportions, difference of, in distinct races.
Protective colouring in butterflies; in lizards; in birds; in mammals.
Protective nature of the dull colouring of female Lepidoptera.
Protective resemblances in fishes.
Protozoa, absence of secondary sexual characters in.
Pruner-Bey, on the occurrence of the supra-condyloid foramen in the humerus of man; on the colour of negro infants.
Prussia, numerical proportion of male and female births in.
Psocus, proportions of the sexes in.
Ptarmigan, monogamous; summer and winter plumage of the; nuptial assemblages of; triple moult of the; protective coloration of.
Puff-birds, colours and nidification of the.
Pugnacity of fine-plumaged male birds.
Pumas, stripes of young.
Puppies learning from cats to clean their faces.
Pycnonotus haemorrhous, pugnacity of the male; display of under-tail coverts by the male.
Pyranga aestiva, male aiding in incubation; male characters in female of.
Pyrodes, difference of the sexes in colour.
Quadrumana, hands of; differences between man and the; sexual differences of colour in; ornamental characters of; analogy of sexual differences of, with those of man; fighting of males for the females; monogamous habits of; beards of the.
Quain, R., on the variation of the muscles in man.
Quatrefages, A. de, on the occurrence of a rudimentary tail in man; on variability; on the moral sense as a distinction between man and animals; civilised men stronger than savages; on the fertility of Australian women with white men; on the Paulistas of Brazil; on the evolution of the breeds of cattle; on the Jews; on the liability of negroes to tropical fevers after residence in a cold climate; on the difference between field- and house-slaves; on the influence of climate on colour; colours of annelids; on the Ainos; on the women of San Giuliano.