Regeneration, in sea-anemones and jelly-fish, [4], [35];

of an entire organism, [34];

Weismann on, [51] et seq.;

in Begonia, [52];

Rev. G. Henslow on, [53];

and stirp, [59].

Rejuvenescence, [166].

Representative congenital changes, [65].

[Reproduction], essential meaning of sexual, [8], [11];

in the Protozoa, [16];