"Principles of Biology," Spencer's.
"Principles of Geology," Lyell's. -Darwin on. -Wallace's review of.
Pringlea antiscorbutica (Kerguelen cabbage).
Priority, Falconer and Owen on.
Proboscidean group, extinction of.
Progress, in forms of life and organisation.
Progression, tendency in organisms towards.
Progressive development.
Pronuba, the Yucca moth, Riley on.
Proteaceae, former extension of.
Protean genera, list of N. American.
Protection, colour in butterflies and. -thorns as. -Wallace on. -colour and. -colour of birds and. -colour of caterpillars and. -colour of shells and. -Darwin's views on Sexual Selection and. -evolution of colour and. -mimicry and. -monkeys' manes as. -Wallace on colour and. -Wallace on wings of lepidoptera and.
Protective resemblance, Wallace on.
Proterogyny, in Plantago.
Prothero, G.W.
Protococcus.
Protozoa.
Providential arrangement.
Prunus laurocerasus, extra-floral nectaries visited by ants.
Psithyrus.
Psychology, Delboeuf on. -Romanes' work on comparative.
Ptarmigan, protective colouring of.
Pterophorus periscelidactylus.
Publishing, over-readiness of most men in.
Pumilio argyrolepis, Darwin on seeds of.
Purbeck, Plagiaulax from the.
Purpose, Darwin on use of term.
Pyrola, fertilisation mechanism in.
Quagga, hybrid between horse and.
Quails, seed-dispersal by migratory.
"Quarterly Journal of Science," article on Darwin and his teaching in. -review by Wallace of the Duke of Argyll's "Reign of Law."
"Quarterly Review," Mivart's article. -Bishop Wilberforce's review of "Origin" in. -article on zebras, horses, and hybrids.
Quartz, segregation in foliated rocks.
Quatrefages, Jean Louis Armand de, de Breau (1810-92): was a scion of an ancient family originally settled at Breau, in the Cevennes. His work was largely anthropological, and in his writings and lectures he always combated evolutionary ideas. Nevertheless he had a strong personal respect for Darwin, and was active in obtaining his election at the Institut. For details of his life and work see "A la Memoire de J.L.A. de Quatrefages de Breau," 4o, Paris (privately printed); also "L'Anthropologie," III., 1892, page 2. -letters to. -translation of paper by. -on proportion of sexes in Bombyx.
Quenstedt, work on the Lias by.
Queries on expression.
Rabbits, Angora, skeletons of. -Darwin's work on.
Race, nature's regard for.
Racehorse, selection by man. -Wallace on fleetness of. -equality of sexes in.
Races of man. -causes of difference in. -Wallace on.
Rafflesia, parasites allied to.
Rain, effect on leaves. -movements of leaves as means of shooting off.
Ramsay, Sir A.C., on origin of lakes. -Geological Society hesitates to publish his paper on Lakes. -on ice-action. -on insects in tropics. -memoir by Geikie of. -on denudation and earth-movements. -overestimates subaerial denudation. -on Parallel Roads of Glen Roy. -on Permian glaciers. -proposal that he should investigate glacial deposits in S. America. -mentioned.
Range, De Candolle on large families and their. -coleoptera and restricted. -of genera. -of shells. -size of genera in relation to species and their. -of species.
Ranunculaceae, evidence of highness in.
Ranunculus auricomus.
Ranyard, A.C., letter to "Nature" on pangenesis.
Raoul Island, Hooker on.
Raphael's Madonna, referred to by Darwin.
Raspberry, germination of seeds from a barrow. -waxy secretion of.
Rattlesnake, Wright on uses of rattle of.
Raven, said to pair for whole life.
Ray Society, work of.
Raymond, Du Bois, work on plants.
Reade, T.M., letters to. -on age of the world.
"Reader," sold to the Anthropological Society.
Reading, Darwin complains of lack of time for. -little time given by scientific workers to.
Reciprocal crosses, half-sterility of.
Rede Lecture, by Phillips (1860).
Reduction, cessation of selection as cause of. -organs of flight and. -wings of ostrich and.
References, Darwin on importance of giving. -Wallace on.