X CONTENTS. 



searches of Sir John Dalyell. Van Beneden's observations, 

 and hypothesis concerning the transformation of Medusoids 

 into Polyps p. 128-134 



CHAPTER XV. 



CABYOPHYLLIA. 



Zoophytes until recently believed to be vegetables. First 

 glimpses of their real nature. Peyssonnel. Jussieu's specu- 

 lations. Ideas of Henry Baker Ellis. History of Caryo- 

 phyllia Smithii. Formation of Coral islands. Varieties of 

 Coral reefs. Elevation and subsidence of land. Prodigious 

 extent of Coral formations. Succession of species of Coral 

 Zoophytes p. 135-149 



CHAPTER XVI. 



ACTINIJE. 



How to procure Sea- Anemones. General habits of the Actiniae ; 

 their voracity and power of fasting ; adhesive and stinging 

 properties. Senses of the Actiniae ; capability of repairing 

 injuries. Dicquernare's experiments. Reproduction of Ac- 

 tinia mesembryanthemum. Propagation of Actinia lacera and 

 Actinia dianthus by spontaneous separation of fragments. 

 Precautions to be observed in rearing Actiniae. Unrefined 

 habits of some species. Actiniae used as food. . . p. 150-167 



CHAPTER XVII. 



LUCERNARIA CAMPANULATA. 



Description of the zoophyte. Habits of Lucernaria. p. 168-169 



CHAPTER XVIII. 



ENCRINITES COMATULA. 



Sermons in stones. Encrinitic marble. St. Cuthbert's beads. 

 Elaborate structure of fossil Encrinites. Pentacrimts Bria- 

 reus< Pentacrinus Europcem. Rarity of living Encrinites. 



