Individual differences, Weismann, [39], [41], [43].
Influence of a previous sire upon the progeny of the same dam, see [Telegony].
Influence of external conditions, see [Acquired characters].
Influence of pollen upon somatic tissues, see [Xenia].
Inheritance of acquired characters, see [Acquired characters].
Invertebrates, Weismann on sexual apparatus of, [72], [74], [109].
J.
Jelly-fish, regeneration in, [4].
Jordan, on inheritance of acquired characters in plants, [93].
K.