Index. 



5" 



Reflex action, 415 ; and instinct, 

 422 



Regeneration of lost parts, 41 ; 

 in relation to heredity, 124; 

 law of growth concerned in, 

 126 



Reindeer wounded, 392; change 

 of habit in, 445 



Remnants or vestiges, 196 



Keproduction, nature of, 13; 

 and development, 36 ; in the 

 protozoa, 3s ; in the metazoa, 

 41 ; by budding, 42 ; sexual, 

 42 ; peculiar modifications of, 

 45 ; developmental, 143 



Reproductive cells, continuity 

 of, 131 



Resemblance, protective, 82 ; 

 aggressive, 90 



Respiration an essential life- 

 process, 3 ; in illustration of 

 the process of life, 21 



Retardation and acceleration, 221 



Retina of man, 274 ; of birds, 284 



Retinal purple, 276 



Revenge, 4ul 



Reversion, 191 



Revolution and evolution, 119 



Rhea, neck resembling snake, 88 



Eliinolophus ferri-equinum, 

 hipposide.ros, 65 



Rbyme-association in parrot, 356 



Ribot, M., on attention, 343 



Richardson, Mr. Charles, on 

 railway servants killed by 

 train, 388 



Riley, Prof., on Phengodini, 223 



Romanes, Prof. G. J., on physio- 

 logical isolation, 104 ; on the 

 cessation of selection, 190; on 

 the failure of heredity, 192 ; 

 on the reversal of selection, 

 193 ; on sense of smell in dog, 

 on colour-sense in chimpanzee, 

 283 ; on ideas, 326 ; on dog 

 cowed by noise, 340 ; on ab- 

 stract ideas in animals, 348 ; 

 on parrot, 353 ; on localization 

 and discrimination, 359 ; ex- 

 amples of animal intelligence 

 considered, 362 ; on abstract 

 ideas in the capuchin, 368 ; 

 definition of reason, 372 ; on 

 strange attachments in birds, 

 396 ; on some emotions in 

 animals, 400 ; on endurance of 

 pain in dogs and wolves, 402 : 

 on sense of humour in dog, 

 4uY ; on indefinite morality in 

 animals, 413 ; definition of 

 instinct, 422 ; on education of 

 ant, 428 ; on homing faculty 

 of bees, 428 ; on consciousness 

 and instinct, 432 ; summary 

 of his conclusions on instinct, 

 434 ; on instincts of Siamese 

 ants, 449 ; his psychological 

 scale, 478 ; on the world as an 

 eject, 479 



Rotation, sense of, 269 



Rotifers, absence of fertilization 

 in reproduction, 45 



Roux, on extirpation of cleavage- 

 cell of frog's egg, 214 



Rowell, G. A., on " Beneficent 

 Distribution of Pain," 392 



Ruffs, variability of males, 110, 



Russell, Mr. W. J., on smell 

 in the dog, 255 



Saitis pulex, 450 



Salinity of water, effects of, on 

 brine-shrimp, 1 64- 



Salmon, new variety of, in Tas- 

 mania, 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 de- 

 velopment of peripatus, 142 



Seebohm, Mr. H., on birds' eggs, 

 410 



Segregation, 99 



Selection, as compared with eli- 

 mination, 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 illus- 

 traria, 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 ; organic 

 and muscular, 244 ; touch, 245i; 

 temperature-sense, 249 ; taste, 

 250 ; smell, 253 ; hearing, 261 ; 

 sight, 272 ; contact and telces- 

 thetic, 249; problematical, 297 



Sensibility, 385 ; variations of, 

 449 



Sensitive, special use of the term, 

 9 



Sensitiveness and sensibility, 385 



Sentiments, 391 ; in animals, 403 



Sex-differentiation, 58 



Sexual union of ovum and sperm 

 a source of variations, 149 ; 

 characters, secondary, 197 ; 

 selection, 197 



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 



Skertchley, Mr. S. B. J., on 

 leaf-butterfly, 86 



Slave-making ants, 425 



Smell, sense of, 253 



Smerinthus ocellatus, 165 



Smith, Mr. G. Munro, on elimi- 

 nation among microbes, 80 



Snail, variations in banding of 

 shells, 75 ; sense of smell in, 

 260 ; auditory sac, 265 ; eye of, 

 292 ; spicuhe amoris of, 450 



Snakes, mimicry in, 88 



Snipe, drumming of, 448 



Sollas, Dr. W. J., on regenera- 

 tion 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 instinc- 

 tive emotions, 395 ; on perfect 

 instincts of chicken, 424 ; on 

 deferred instinct in swallow, 

 425 



Sparrows in New Zealand, 445 



Specific characters, utility of, 

 110 ; constancy of, 111 



Spencer, Mr. Baldwin, Fig. of 

 pineal eye, 288 



Spencer, Mr. Herbert, law asso- 

 ciated with his name, 37 ; phy- 

 siological 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. 3s 1 ; on 

 assthetics, 412; on instinct and 

 reflex action, 422 



Sperm-cell and egg-cell, 13 ; con- 

 ditions which determine pro- 

 duction of, 60 



Sphex, instinct of, 429, 456 



Spiders, hunting, mimicry in, 89 ; 

 Javan, Mr. H. O. Forbes on, 

 90 ; love-antics of, 208, 450 ; 

 ocelli of, 289 



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 re- 

 triever, 400 



Stenorhynchus, 457 



Sterility, how developed, 108 



Stewart, Mr. Duncan, on sym- 

 pathy in cat, 398 



Stimuli, 302 



Strange, Mr., on love-antics of 

 satin bower-bird, 450 



Striped ancestor of Equida;, 230 



Struggle lor existence, 79 ; varia- 

 tions 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 aesthetic sense 

 of beauty, 411 



Sutton, Mr. Bland, on hen phea- 

 sant 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 ele- 

 phant, 369 



Symbolic nature of mental pro- 

 ducts, 314 



Symonds, Mr. J. A., on "world- 

 consciousness," 478 



Sympathy in animals, 397 



