SUBJECT INDEX. 



Aberrations, among Lepidoptera, 

 237 



Abnormalities, spontaneous ori- 

 gin of, 57, 59 



Abyssal, light, theory of, 254; 

 fauna, 254 



Acacia, interchange of root and 

 stem in, 376 



Acceleration of growth, persist- 

 ence of, 204, 207 



Acclimatisation, to high tem- 

 perature, 379; to saline solu- 

 tions, 382; in tadpoles, 385; in 

 mice, 386; in horse, 387; in 

 man, 387 



Acerina cernua, measurements 

 of, 14 



Acquired Characters, in lowland 

 and highland plants, 311; in 

 spiderwort, 313 



Acquired Characters, heritable- 

 ness of, 352; in maize, 352; in 

 cress, 353; in ducks, 353; in 

 sheep, 354; in dogs, 355; in 

 butterfly, 356; in guinea-pigs, 

 363; in mould, 377, 378 



Adaptability, a property of pro- 

 toplasm, 373, 387; innate, 390 



Adaptation, want of, as a cause 

 of variability, 217, 218; sea- 

 sonal, in Lepidoptera, 234, 241; 

 in mammals, 243; in aquatic 

 and terrestrial plants, 266; in 

 maritime plants, 270; of di- 

 gestive organs to food, 294, 295; 

 of plants to changed climate, 

 311, 312; and definite varia- 

 tions, 373 



Adaptive variations, 371; in 

 plants, 374; in moulds, 375, 

 377, 378; in sunflower, 375; in 

 acacia, 376; in willow, 376; in 

 brambles, 376; in Flagellata, 

 379; in Stentor, 381; in other 

 Protozoa, 382; in Mollusca, 

 383; in Actinia, 384; in tad- 

 poles, 385; in mice, 386; in 

 horse, 387; in man, 387; con- 

 cern average variations, 389; 

 do not render natural selection 

 unnecessary, 391; explained 

 by germinal selection, 395 

 Aerial and aquatic plants, 265 

 Aggressive resemblance, 255 

 Ainos, correlation in skeletons 



of, 82 

 Alpine plants, compared with 



lowland, 311 

 Alpine climate, effect of, on 



plants, 311 



Alternative heritage, 132, 156 

 Ammonia, effect of, on larvae, 



301 

 Amoebae, acclimatisation of, to 



saline solutions, 382 

 Amphibious plants, 265 

 Amphidasys betularia, variation 



in, 91 



Amphimixis, 103, 114 

 Analogous Variation, 96 

 Ancestors, impress individuality 



on sex-cells, 134 



Ancestral Heredity, Law of, 122 

 Ancon sheep, origin of, 58, 172 

 Animals, hybrids among, 167, 



168 



Anthropometric data, analyses 

 of, 122 



403 



