Internal forces of evolution, [16], [23], [24], [31], [60], [82]-[4].

Intrabiontic selection, [29].

Ishikawa, Professor, [34].

Japanese cocks, long-tailed, [34], [44], [78].

Kallima, [22], [23], [50].

Katagramma, [22].

Knowledge, its character, [5].

Lamarckian principles, [24], [29] et seq., [31] et seq., [38], [63]-[64], [68], [84].

Leaves, imitated by butterflies, [20] et seq.

Locomotive, simile of, [11].