TABLE OF CONTENTS. 



Bibliography, 



Critical, Review of Literature, 



General Morphology, 



The homologies of the mesenteries, 



Complete and incomplete mesenteries, 



Dimorphism, 



Colony formation, . 



Ccenenchyma, 



Skeleton formation, 



Origin and arrangement of spines, 



Retrogressive development, 



Classification, 



Table of Genera and Species, 

 Description of Species, 

 Geographical Distribution, . 

 Bathymetrical Range, 

 Anatomy of the Antipathin^:, 



Mesenterial filaments, 



General conclusions, 



Systematic Index, 



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