TABLE OF CONTENTS. 



PART I.— ON THE HYDROCORALLIN^. 



Introduction, . 



Explanation of terms employed, 



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11 

 12 



Section I. — On the Structure of the Milleporid.e. 



Introduction — Mode of occurrence of Millepora nodosa ; its appearance when living, 



Literature of the subject, 



Methods employed, 



Structure of the hard and soft parts, 



Main structure of the ccenosteum, 



Histology of the ccenosteum, 



Chemical composition of the ccenosteum, 



Structure of the zooids, 



„ ,, ccenosarc, 



,, ,, nematocysts, . 

 General remarks on the structure of the MiLLEPORiDiE, 

 Vegetable parasites of the Milleporid^e, 



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 14 



17 

 18 

 18 

 20 

 20 

 21 

 24 

 27 

 28 

 30 



Section II. — On the Structure of the Stylasterid,e. 



Introduction, ........ 



Literature of the subject, ...... 



Methods employed, ....... 



Structure of the hard and soft parts in the several genera of the Stylasterip.*:, 



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