CONTENTS. 



Preface 



Introduction 



ADULT COLONY. 

 External Characters 



Column wall 



Tentacles 



Disc and mouth 



Color 



Reproduction 



External characters on decalcification 



Anatomy and Histology 



Column wall and disc 



Tentacles 



Stomodaeum 



Mesenteries 



Mesenterial filaments 



Skeletotrophic tissues 



Septal invaginations, interseptal loculi, 

 and gastro-ccelomic cavity 



Gonads 



Coral lum 



Histolog}- 



Wall or theca 



Septa 



Synapticula 



Golumella 



Dissepiments 



Epitheca and basal plate 



9 

 '4 

 '5 

 16 



iS 



21 



21 



2 3 



2 3 



24 



2 9 

 3 



34 

 37 

 38 



40 



45 

 46 

 52 

 53 

 55 

 56 



POSTLARVAL DEVELOPMENT. 



Larva 



Young polyp 



Tentacles 



First cycle of exotentacles 



First cycle of entotentacles 



Secondary exotentacles 



Second cycle of entotentacles and third 

 cycle of exotentacles 



Third cycle of enlotentacles and fourth 



cycle of exotentacles 



Mesenteries 



First cycle of mesenteries (protocnemes)... 



Second cycle of mesenteries (metacnemes) 



Third cycle of mesenteries 



Coral lum 



First cycle of entosepta and second cycle 

 of exosepta 



Second cycle of entosepta and third cycle 

 of exosepta 



Third cycle of entosepta and fourth cycle 



of exosepta 



Basal plate 



Epitheca 



Coluinella 



Anatomy and histology of larva and young 



Pb'P 



Young polyps 



References 



Explanation of plates 



iii 



(,i 



65 

 65 

 66 

 69 



73 

 75 

 76 

 79 

 83 

 56 



86 

 93 



09 



117 



119 

 I2 z 

 u^ 



126 



