PART IV.—MORPHOLOGICAL DEVELOPMENT.
1. The Problems of Morphology. 2. The Morphological Composition of Plants. 3. The Morphological Composition of Plants, continued. 4. The Morphological Composition of Animals. 5. The Morphological Composition of Animals, continued. 6. Morphological Differentiation in Plants. 7. The General Shapes of Plants. 8. The Shapes of Branches. 9. The Shapes of Leaves. 10. The Shapes of Flowers. 11. The Shapes of Vegetal Cells. 12. Changes of Shape otherwise caused. 13. Morphological Differentiation in Animals. 14. The General Shapes of Animals. 15. The Shapes of Vertebrate Skeletons. 16. The Shapes of Animal Cells. 17. Summary of Morphological Development.