INDEX 



Aberdeen mice, looi 

 accessory chromosome, 529 

 accidental variations, 964 

 acclimatisation, 1040 



defined, 104 1 



natural, 1048 



of flora, 1060 

 acquired character, 10 12 

 acquired characters, development of, 



489 

 acquired immunity transmitted, 10 12 

 adaptation — 



artificial, 1079 



functional, 1063 



Lamarck's theory of direct, 1077 



negative, 170 



passive, 1065 



positive, 170 



to high altitudes, 1044 

 adaptations, 1060 



anatomical, 1064 



before birth, 1075 



caution re, 1078 



classified, 1062 



Darwin's theory, 1077 



developmental, 1074 



imperfect, 1076 



instances of, 1073 



in symmetry, 1070 



of soft structures, 1073 



origin of, 1077 



special, 1061 

 adjustment — 



defined, 1062 



failures in, 999 



protective, 1062 



to environment, 1256 

 adjustments of people to place, 1395 

 adolescence, 590, 1264 

 adrenal capsules, 296 

 adrenalin, 292 

 aeration, 318 

 aerial life, 95 



aerobic fermentative organisms, 853 

 age— 



and activity, 801 



and size, 801 



diversity among animals, 800 



of trees, 33 

 ageing, 1266 



albatross, 39, 93 



courtship of, 512 

 alcohol, effects on offspring, 990 

 alcoholic rats, 1002 

 Alternation of generations, 767 

 amino-acids, 11, 14 

 amoeba, motion of, 940 

 amoebae, 22, 57 



freezing of, 65 

 amoeboid movement, 231, 232 

 amoeboid processes, 858 

 anabolism, 11, 12, 321, 459 



ratio, 849 

 anachronisms, 899 



anaerobic fermentative organisms, 853 

 analogy in organs, 679 

 analysis of forms and functionings, 



1136 

 anaphylactic shock, 353 

 anaphylaxis, 353 

 anatomy, human, 1236 

 ancestral habits, persistence of, 928 

 ancestral trait, 1044 

 animal behaviour, 593 

 animal behaviour, evolution of, 642 

 animal body, chemistry of, 338 

 animal heat, 356 

 animal intelligence, 813 

 animal mind, 549 

 animal parasites, adaptive characters 



of, 151 

 animal population, checks on, 1275 

 animal prescriptions, 121 7 

 animal societies, diseased conditions 



in, 127 

 animal tissues, survey of, 691 

 animals — 



Antarctic, 104 



colour vision of, 245 



epizoic, 137 



hypnosis, 261 



imperfections in, 1089 



industries of, 814 



language of, 597 



locomotion, 226 



marine, 1292 



origin of land, 92 



plagues of, 202 



play in, 808 



social, 109 



