Mitral valve, [175]

Mivart, Dr. St. George, [246]-[248]

Modern spirit, [241]

Modification of species, [92]

Mollusca, [56], [58], [59], [60], [61], [96]

Morality and religion, [237], [238]

Morality of Stoics, [238]

Morley, John, [217], [260]

Mosaic Deluge, [235]

Moseley, Professor H.N., [15]