CONTENTS. 



FIRST PART. 



GENEKAL INTRODUCTION— 



I. Anatomical Section (§§ 1-140), , 



Chapter I. The Unicellular Organism, 



„ II. The Central Capsule, . 



„ III. The Extracapsulum, . 



„ IV. The Skeleton, 



II. BlOGENETICAL SECTION (§§ 141-200), 



Chapter V. Ontogeny (Individual Development) 

 ,, VI. Phylogeny (Genealogical Development), 



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



Chapter VII. Vegetative Functions, 

 „ VIII. Animal Functions, 



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



Chapter IX. Geographical Distribution, 

 „ X. Geological Distribution, 



V. Bibliographical Section (§§ 251-254), , 



SYSTEMATIC PART, 



I. Subclass PORULOSA, . 



Legion I. SPUMELLARIA v 



Order 1. Colloidea, 

 2. Beloidea, 



cl PERIPYLEA, 



3. Sph^roidea, 



4. Prunoidea, 



5. Discoidea, 



6. Larcoidea, 



Legion IL ACANTHARIA vel ACTIPYLEA, 



Order 7. Actinelida, . 



„ 8. acanthonida, 



,, 9. Sph^rophracta, 



„ 10. Prunophracta, 



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