Dispersal, means of, [356].
—— during glacial period, [365].
Distribution, geographical, [346].
——, means of, [356].
Disuse, effects of, under nature, [134].
Divergence of character, [111].
Division, physiological, of labour, [115].
Dogs, hairless, with imperfect teeth, [12].
—— descended from several wild stocks, [18].
——, domestic instincts of, [213].