Marsh, [83].

Martensen, [187].

Mayer, Robert von, [37], [129], [149], [155].

McCosh, [224].

Mill, John Stuart, [242].

Mivart, [55], [106], [223], [245].

Moleschott, [42].

Müller, Fritz, [79].

Müller, Max, [18], [96], [98].

Murchison, Sir Roderick, [54].