Chapter I

. The Unicellular Organism, i

" II. The Central Capsule, xxiv " III. The Extracapsulum, li " IV. The Skeleton, lxviii

II. Biogenetical Section (§§ 141-200), xciii

## Chapter V . Ontogeny (Individual Development), xciii

" VI. Phylogeny (Genealogical Development), ci

III. Physiological Section (§§ 201-225), cxxviii

## Chapter VII . Vegetative Functions, cxxviii

" VIII. Animal Functions, cxl

IV. Chorological Section (§§ 226-250), cxlvi

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