Part V.--Physiological Development.

I.--THE PROBLEMS OF PHYSIOLOGY 239

II.--DIFFERENTIATIONS BETWEEN THE OUTER AND INNER TISSUES OF PLANTS 244

III.--DIFFERENTIATIONS AMONG THE OUTER TISSUES OF PLANTS 251

IV.--DIFFERENTIATIONS AMONG THE INNER TISSUES OF PLANTS 272

V.--PHYSIOLOGICAL INTEGRATION IN PLANTS 292

VI.--DIFFERENTIATIONS BETWEEN THE OUTER AND INNER TISSUES OF ANIMALS 299

VII.--DIFFERENTIATIONS AMONG THE OUTER TISSUES OF ANIMALS 309

VIII.--DIFFERENTIATIONS AMONG THE INNER TISSUES OF ANIMALS 323

IX.--PHYSIOLOGICAL INTEGRATION IN ANIMALS 373

X.--SUMMARY OF PHYSIOLOGICAL DEVELOPMENT 384

X^A.--THE INTEGRATION OF THE ORGANIC WORLD 396