Part Iv.--Morphological Development.

CHAP. PAGE

I.--THE PROBLEMS OF MORPHOLOGY 3

II.--THE MORPHOLOGICAL COMPOSITION OF PLANTS 17

III.--THE MORPHOLOGICAL COMPOSITION OF PLANTS--Continued 37

IV.--THE MORPHOLOGICAL COMPOSITION OF ANIMALS 85

V.--THE MORPHOLOGICAL COMPOSITION OF ANIMALS--Continued 111

VI.--MORPHOLOGICAL DIFFERENTIATION IN PLANTS 128

VII.--THE GENERAL SHAPES OF PLANTS 134

VIII.--THE SHAPES OF BRANCHES 145

IX.--THE SHAPES OF LEAVES 152

X.--THE SHAPES OF FLOWERS 161

XI.--THE SHAPES OF VEGETAL CELLS 175

XII.--CHANGES OF SHAPE OTHERWISE CAUSED 178

XIII.--MORPHOLOGICAL DIFFERENTIATION IN ANIMALS 183

XIV.--THE GENERAL SHAPES OF ANIMALS 186

XV.--THE SHAPES OF VERTEBRATE SKELETONS 209

XVI.--THE SHAPES OF ANIMAL CELLS 228

XVII.--SUMMARY OF MORPHOLOGICAL DEVELOPMENT 231