INBBX 



571 



Wallace, and natural selection, 467 

 War, as a selective factor, 317, 318, 

 320, 321, 323 



resulting in the destruction of 

 the biologically fit, 321, 323 

 Weismann, on fecundity, 6 



and natural selection, 9 



and the germ -plasm -in repro- 

 duction, 18, 26 



on maturation of cells, 21 



experiments with Cypris rep- 

 twns, 24 



his theory of germinal selec- 

 tion, 44, 45, 149, 467 



on the theory of evolution, 65 



on instinct, 73, 86 



on amphimixis, 97 



on consanguinity, 111 



on transmissibility of somatic 

 modifications, 139 



Weismann, on luminous organs of 

 deep-sea fishes, 148 

 teratology offers us apparent 

 contradiction to the theory 

 of, 170 

 on the limits of knowledge, 501 

 Westergaard, Professor, statistics 

 on suicide, 185 

 statistics on fertility, 331 

 Wirminghaus, Professor, on suicide, 



185 

 Wolff, his theories in relation to 



those of Weismann, 42 

 Worker ants, degeneration of the 



wings of, 77 

 Working classes, apathy of, due to 

 social conditions, 285 



ZoUner, and his part in modern 

 scientific developments, 496 



THE END 



BILLING AND SONK, LTD., PRINTERS, GUILDFORD. 



