Migrations of man, effects of.
Migratory instinct of birds; vanquishing the maternal.
Mill, J.S., on the origin of the moral sense; on the “greatest happiness principle;” on the difference of the mental powers in the sexes of man.
Millipedes.
Milne-Edwards, H., on the use of enlarged chelae of the male Gelasimus.
Milvago leucurus, sexes and young of.
Mimicry.
Mimus polyglottus.
Mind, difference of, in man and the highest animals; similarity of the, in different races.
Minnow, proportion of the sexes in the.