INDEX 



Abbott, Lewis, 22 



Ability, intellectual, inherited trait, 



171 



Acceleration, prepubertal, 69 

 Acquired characteristics, inheritance 



of, 156-157 

 Acromegaly, 64 

 Actions, intelligent, 105, 119 



mechanical, 105 



reflex and instinctive, theory of the 

 origin of, 107 



tropisms, 105 



volitional, 100 



Activities, control of bodily, 84 

 Adams, Henry, 126, 128 

 Adaptation, intelligent, 106 

 Adaptive reactions, 113 

 Adjustment, automatic, 150 



cultural, 136 



Darwinian theory of, 126 



human, 134 



intelligent, 119, 150 



material, 133 



societal, 136 

 Adjusters, 84, 86 



Africa, racial amalgamation in, 176 

 Age, Chellean, 22 



Mesozoic, 19 



of Pithecanthropus, 16 



Pliocene, 9 



Upper Siwalik, 16 

 Alimentary canal, development, 49 



organs developing from, 52 

 Alterations, chemical, in senescence, 71 

 Amalgamation of races, 175 

 Amalgamation, tendency to, 176 



Ameghino, F., 10 



American, typical, 175 



Amnion, 57 



Amniotic cavity, 43 



Amoeba, 105, 112, 153 



Analogy, 129 



Anatomical variations, 75-78 



Animal, consciousness, theory of, 112 



fitness, 135 



intelligence, 104-112 



life, changes in, 104 



reactions, 121 



size, 63 



behavior of, 108 

 Animals, invertebrates, 39 



mammals, 39 



metazoa, 39 



protozoa, 39 



vertebrate, 39 

 Ant, instincts of, 108 

 Anthropophagy, 144 

 Anthropoids and man, Huxley's com- 

 parison, 131 



phylogeny, 36 

 Anti-bodies, see Hormones 

 Antiquity, means of determining, 8 

 Appendix, comparison of, in various 

 animals, 74 



vermiform, 73, 74 

 Archipallium, 46, 93 

 Areas, association, of brain, 120 



frontal, of brain, 120 

 Aristotle, 81 

 Art, Aurignacian, 34 

 Art, Cro-Magnon, 32 



