404 



SUBJECT INDEX. 



Anthropometric measurements, 

 obey Laws of Chance, 12, 13; 

 variability in, 24 



Aphides, measurements upon, 

 179 



Aquatic plants, 265; evolution 

 of, 393 



Aral Sea, cockle present in, 275 



Arctic climate, effect of, on mam- 

 mals, 243; effect of, on plants, 

 313 



Arithmetical mean error, deter- 

 mination of, 23 



Artemia, the effect of salinity on, 

 271, 274 



Asexual reproduction, in an 

 ostracod, 177; in daphnia, 178; 

 in aphis, 179; in plants, 183; 

 in potato, 184; in apple, 185 



Assertive mating, increases cor- 

 relation, 151 



Asymmetrical curves of distribu- 

 tion, 29; obtained by expand- 

 ing binomials, 31 



Asymmetrical series, fitted with 

 calculated curves, 30; types 

 of, 33 



Asymmetry, index of, 33 



Atavism, 139 



Aurelia aurita, variations in, 30 



B 



Babies, variability of, 205 

 Basset hounds, records of, 122 

 Bees, effect of nutrition on, 287 

 Bertillon's system, useless for 



identical twins, 118 

 Binomial, expansion of, 31 

 Binomial curve, approximation 



of, to probability curve, 12; 



types of, 32 

 Biophors, 102 

 Birds, effects of foods on, 293; 



geographical races of, 325 

 JttscuteUa Icevigata, discontinu- 

 ous variation in, 64 

 Bisexual descent, controlled by 



Law of Heredity, 134 

 Blastogenic variations, 101, 242, 



244 



Blended heritage, 132 



Brain, diminished by disuse, 332 



Branchipus, in relation to Ar- 

 temia, 274 



Brothers, relation between, 128, 

 135; hereditary resemblance be- 

 tween, 151; correlation be- 

 tween, 347 



Bud- Variation, in nectarine, 185; 

 in Chrysanthemum, 186; in 

 moss-rose, 186; causes of, 186; 

 probably, discontinuous varia- 

 tion, 187 



Buttercup, variation in petals of, 

 29 



Canidse, variation in, 327 



Carcinus mosnas, asymmetry in 

 measurements of, 39; correla- 

 tion in, 80; natural selection 

 in, 337 



Cardium edule, effect of salinity 

 on, 275 



Castration, effect of, on animals, 

 95 



Caterpillars, protective resem- 

 blance in, 260 



Cave animals, 251, 253, 254 



Centroid vertical, defined, 17 



Cervical sympathetic nerve, in- 

 herited effects of section of, 

 363 



Characters, new, produced by 

 crossing, 161 ; acquired, herit- 

 ableness of, 352 et seq.; in 

 guinea-pigs, 363 



Chlorophyll, colouring matter of 

 larvae, 291 



Chrysalides, resemblance of, to 

 surroundings, 258 



Chrysanthemum leucanthemum, 

 variation in, 46 



Chrysanthemum tsegetum, varia- 

 tion in, 15; origin of many- 

 rayed form of, 63 



Civilisation, effect of, on correla- 

 tion, 82 



Climate, producing local races, 

 311, 327; effect of, on hairy 

 covering of animals, 329 



