Index. 



375; on language .-uul tlumglit. 

 37; paraphrased, 407; on 

 materialism, 471 

 JTuresB, 292 



llut rex and impfrntnr, \ 00 

 Musical and article faculty, 484 

 Mussel, freshwater, gills of, 4; 



olfactory organ of, 260 

 Mutilation, law of growth after, 

 126; not the best kind of evi- 

 dence of transmitted modifica- 

 tions, 12 



NAEGELI, 159 



NAISU, Mr. John G., on the 

 cockatoo, 354 



Natural selection, variation and, 

 61 ; two modes, elimination 

 and selection proper, 79 ; and 

 the effects of use and disuse, 

 174 ; not to be used as a magic 

 formula, 184; and instinct, 

 445; and human thought, 484 



Nerves, briefly described, 246; 

 afferent and efferent, 303 



Xrstor notability 446 



Nests of bower-bird and hum- 

 minn-bird, 408; instinctive 

 building of, 453 



NKTTLBSHIP, Mr., on a lion, 400 



Neural processes, environment 

 of, 491 



Neurosis and psychosis, 465 



Neuter insects, 440 



New Zealand sparrow, 445 ; 

 parrot, 446 ; chaffinch, 454 



NICHOLS, on taste, 251 



Noctule, 66 



NOIKK, on concepts, 325 



Smniiitn toluiaginis, 90 



- Mr. \V. K., quoted, 420 



Nouraena, or " things in them- 

 selves," 470 



Nucleus of animal cell, 10; as 

 controlling formative process 

 in, 124 



Nutrition in illustration of the 

 process of life, '25 



Object, nature of, 313, 437 

 Ocelli in insect.-, 28 



<>,,,-h,ilium, 293 



< iptogram, 276 



Organic combination, hypothesis 



of, 150, 240 

 Organic evolution, 177 ; as basis 



of comparative psychology, 



336 



Organic growth, 5 

 Organism, unity of. as regards 



body and germ, 161 ; relation 



of, to environment. 1*3 

 Organization, co-ordinating 



power of, 125 ; of bodily and 



mental activities, 419 

 Origin, distinguished from guid- 



. 242 



Origin of species, 242 

 Origin of organic variation*, 231 ; 



. ,1 mctakinetic or mental varia- 



tions 496 

 Ornilhnptera, 179 

 Otoliths, 265, 271 

 OWEN, Sir Richard, suggested 



germinal continuity, US 



Oyster-embryo set fn nrly, 56 ; 



variation ot Mediterranean, Itii 



Pafhyrhj/neui orbifex, 87 

 I'agurut priiteauxii, 457 

 Pain, massive and acute, 379 ; 



capacities of animals for, 391 

 Pangenesis, ]M2 

 Panmixia and disuse, 189 

 /'iil>itii,ni<lrr., 202 

 Paradise, birds of, 202 

 Paranucleus in protozoa, 39 

 I'aramrrcium, reproduction in, 39 

 Parasites, how they feed, 5 

 Parental sacrifice in birds and 



mammals, 57; its limits, 186 

 Parrot, intelligence of, 353 

 Partlienugenetic forms, no 



second polar cell in, 153; the 



drone an exception, 153 

 Par us palustris, 164 

 PEAL, Mr. S., on use of tools by 



elephant, 370 



PKCKIIAM, Mr. G. W., on love- 

 antics of a spider, 208, 450 

 Ptcten, 293 



Pelagic animals, colours of. 83 

 Praraoui*, Dr., on smell, 254 

 Percept, 325, 326 

 Perception, 31 1,324; in animals, 



339 



Perceptual association, 202 

 Perigenesis of the plastidule, 159 

 1'eripatut, 142 

 Persistence, law of, 61 

 Pheasant, hybrids between Am- 



herst and golden, 106; golden, 



hen with cock's plumage, 22s 

 Phennodini, 223 

 Phenomenal nature of object, 



315, 320, 331 

 Photographic psychology, 320, 



326 



Phri/nocfphalu* myftateut, 90 

 Physiological isolation. Hit 

 Physiological and psychological 



activities, 304 ; series. :!st;, 417 

 PICTON, Mrs. K., on Skye terrier, 



398 

 Pigeons, correlated variations in, 



216; silky fantail prepotent, 



Pigs, intestines of, 171 ; cross- 

 ing of, '226, 23 

 Pike, teeth of, 437 

 Pineal gland, 196, 288 

 Pipbtrelle, wing of, 64 

 Pipits as illustrating divergence, 



Pitch, musical, 261 



Plasm, 10 



Plasmngen, 10 



Pliityglottiit, 83 



Play, instinct of, 450 



Pleasure and the special semes, 



243; massive and acute. 379; 



capacities of animals for, 391 

 Plecottu auritii.t. tis 

 Pleiinsiurut, pineal eye of, 288 

 PLOSS, Herr, on sexxiifferentia- 



tioii in man, 59 

 Plover, Kentish, S3, 217 

 Polar cells, extrusion of, 51 ; and 



variation. 153 



Postponement of action, 385 

 Pon.ioN. Mr. K. H.. on colours 



of animal*, 84 ; on Phrynoce- 



'0 ; on 



c it' rpillars and i In 

 165; dimorphism in larva-, 

 187 ; observations on edibility 

 of caterpillars, 212; I 

 of Heredity," qulotation ln.ni, 

 214; on the eating ol un- 

 palatable insects, 445 



Predominant defined. 349 ; and 

 language. 374 



Preferential mating, a means ,,f 

 segregation, 102; and sexual 

 selection, 197 



Preformation and evolution of 

 older writers, 50 



Prepotency, 227 

 j Presentations of sense, 318 

 | Previous sire, effect of. MH 



Prevision as a criterion of intel- 

 ligence, 457 



Principles, mechanical, 368 



Process of life, 20 



Progress, or continuous adapta- 

 tion, 119; adaptation to m.,;e 

 complex circumstances, 183 



Pronghorn, curiosity in, 339 



Proposition, 329 



Protective resemblance and 

 mimicry, 82; general resem- 

 blance, 83; variable resem- 

 blance, 84; special resem- 

 blance, 86; to another 

 organism, 87 ; coloration, a 

 means of segregation, l <> I 



Protection, fosterage and, i!> 



Proteus, sensitive to light, 294 



Protista, 15 



Protohippus, 118 



Protophyta, 15 



I'r. |M].:asm, 10 



Protozoa, nature of, 15; trans- 

 misMon of acquired faculty in, 

 147; origin of ineta/oan vaii.i- 

 tions in. 156 ; psychology of. 

 360 



Psithyrut rupcstrit, 90 



Psychological and phy-iological 



activities. ;|0l ; series. MSI,, 417 



Psychoses and neuroses, 465 

 Ptarmigan, on colour of, 165 



Rabbit, brain of, 171: Anpor* 

 crossed. Tt:, -. oiie-enred, 220; 

 deprived of long lip-haii s. 2 17 ; 

 pnpilln l,,li,itn .ol.25H; ellects 

 of superabundant food cm. .:'.! 



KM . Dr., on dogs swimming 

 rivers, 364; on 

 reasoning " in the fox. 31111 ; on 

 wild and tome ducklings, 435 



Rage and anger, 389 



BANBAT, Dr. \Vm., on smell, 255 



Hats ot Solomon Islands. 11111; 

 of the London Docks. 106; at 

 South Kensington. 115 



RAri.KUSii,Lord,oncolonr-hlcnd- 



ing. 2*3; oil -ellMtlV.--tl.Ulle 



experiments, 298 ; 

 Reality, meaning of term, 314 

 Reason distinguished from intel- 

 ligence. 33U, 365; as defined 

 by Mr. Romanes, 372 

 Recepts. 326, 36* 

 .ei'iirnition-marks, 103; involve 



perceprion, .tr.l 



Re, oust! ucts and reconstruction 

 (mental.), 318 



