RTS
- Saitis pulex, [450]
- Salinity of water, effects of, on brine-shrimp, [164]
- Salmon, new variety of, in Tasmania, [99]
- Saturnia, modification of, by changed food, [163];
- carpini (emperor moth), [258]
- Savages, fetishistic belief in, [494]
- Schaub, Mr., observations on a terrier, [405]
- Schmankewitsch on Artemia, [164]
- Sclater, Mr. W. L., on mimicry in an insect, [88]
- Sedgwick, Mr. Adam, on development of peripatus, [142]
- Seebohm, Mr. H., on birds' eggs, [410]
- Segregation, [99]
- Selection, as compared with elimination, [79];
- illustrated, [92];
- artificial, [172];
- cessation of, [190];
- reversal of, [193];
- sexual, or preferential mating, [197], [452];
- as a factor in the origin of instinct, [447];
- as applied to the intellectual faculties, [498]
- Selenia, illunaria, and illustraria, [238]
- Self, the, or ego, [475]
- Self-consciousness, [460]
- Semicircular canals, [262], [269]
- Senility, introduction of, [184]
- Sensation defined, [305], [324]
- Sense-feelings of animals, [393]
- Senses of animals, [243];
- Sensibility, [385];
- Sensitive, special use of the term, [9]
- Sensitiveness and sensibility, [385]
- Sentiments, [391];
- Sex-differentiation, [58]
- Sexual union of ovum and sperm a source of variations, [149];
- Shame in monkey, [402]
- Sheep, Youatt on, quoted, [455]
- Shells, land, of Sandwich Islands, [99]
- Shipp, Captain, experiment on an elephant, [401]
- Sight, sense of, [272]
- Sitaris, instinct of, [438]
- Skertchly, Mr. S. B. J., on leaf-butterfly, [86]
- Slave-making ants, [425]
- Smell, sense of, [253]
- Smerinthus ocellatus, [165]
- Smith, Mr. G. Munro, on elimination among microbes, [80]
- Snail, variations in banding of shells, [75];
- Snakes, mimicry in, [88]
- Snipe, drumming of, [448]
- Sollas, Dr. W. J., on regeneration of tentacle in snail, [127]
- Somatic, or body-cells, [193]
- Sommering, Fig. of semicircular canals, [270]
- Spalanzani, his experiments on bats, [248]
- Spalding, Douglas, on instinctive emotions, [395];
- on perfect instincts of chicken, [424];
- on deferred instinct in swallow, [425]
- Sparrows in New Zealand, [445]
- Specific characters, utility of, [110];
- Spencer, Mr. Baldwin, Fig. of pineal eye, [288]
- Spencer, Mr. Herbert, law associated with his name, [37];
- physiological units, [125], [153];
- on lap-dogs, [195];
- on the Irish elk and giraffe, [212];
- on diminution in ear-muscles, [215];
- definition of pleasure and pain, [381];
- on æsthetics, [412];
- on instinct and reflex action, [422]
- Sperm-cell and egg-cell, [13];
- conditions which determine production of, [60]
- Sphex, instinct of, [429], [456]
- Spiders, hunting, mimicry in, [89];
- Spinoza, quoted, [61], [379], [460]
- Sponges, reproduction of, [41], [42]
- Spongilla, reproduction of, [46]
- Spore-formation, reproduction by, [38]
- Squirrel of Sarepta, [113]
- Stag-beetles, variation in males of, [180]
- Star-fish, embryo set free early, [56]
- Starling, modified song of, [455]
- St. John, observations on a retriever, [400]
- Stenorhynchus, [457]
- Sterility, how developed, [108]
- Stewart, Mr. Duncan, on sympathy in cat, [398]
- Stimuli, [302]
- Strange, Mr., on love-antics of satin bower-bird, [450]
- Striped ancestor of Equidæ, [230]
- Struggle for existence, [79];
- variations in the intensity of, [112]
- Sturge, Miss Mildred, on the parrot, [355]
- Stylonichia, observations of M. Maupas on, [39]
- Sully, Mr. James, on concepts, [325];
- on propositions, [329];
- on judgment and reason, [330];
- on emotion, [390];
- on æsthetic sense of beauty, [411]
- Sutton, Mr. Bland, on hen pheasant like the male, [228];
- on the action of leucocytes, [439]
- Swallow and swift, convergence in, [117];
- cliff, of United States, [445]
- Swayne, Mr. S. H., on the elephant, [369]
- Symbolic nature of mental products, [314]
- Symonds, Mr. J. A., on "world-consciousness," [478]
- Sympathy in animals, [397]