of Dipleurula, [610] f.

Metamp, [168], [169]

Metaphytes, [41]

—see also Plants, Higher

Metazoa, [40] f.;

rheotaxy of, [21];

origin of, from Protozoa, [40] f.;

flagellate sperms of, [109];

hosts of Polymastigidae, [111]

—see also Animals, Higher