CONTENTS OF VOL. II. 



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 



XL — 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 



PART V.— PHYSIOLOGICAL DEVELOPMENT. 



I. — The problems of physiology 239 



II. — Differentiations between the outer and inner tis- 

 sues OF PLANTS 244 



III. — Differentiations among the outer tissues of plants . 251 

 IV. — Differentiations among the inner tissues of plants . 272 



