CONTENTS. . 



CHAPTER 



CORALS AND C(H<AL MAKERS 



General Observations 



I. Polyp 



I. Actinoid Polyps .... 



1. Non-Coral Making Actinoid Polype 



2. Coral-Making Actinoid Polyps 



3. Classification .... 

 IL Cyathophylloid Polyps . 



111. Alcyonoid Polyps .... 

 IV. Life and Death in Concurrent Progress 

 V. Composition of Corals . 



TI. HVDRcnDS 



HI. Bryozoans 



IV. Alg.e; or Nullipores and Corallines 



V. The Reef-Forming Corals, and the Causes i 

 encing their Growth and Distribu' 



I. Distribution in Latitude . 



II. Distribution in Depth 



III. Local Causes influencing Distribution 



IV. Rate of Growth of Corals 



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3 



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22 

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76 

 81 

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S3 

 S3 

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93 

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