536 T. C. Brown — Development of the Mesenteries 



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Fig. 1. Diagram showing a transverse section in the stomodseal region of 

 a typical Alcyonarian zooid. 



Fig. 2. Diagram of a transverse section through the stomodseal region of 

 Edwardsia. 



Fig. 3. ' Diagram showing the order of introduction of the first six pairs 

 of mesenteries in the genera Actinia, Sagartia, and Bunodes, after Bourne. 



Fig. 4. Diagram showing the order of introduction of the first six pairs of 

 mesenteries in the genera Rhodactis, Halcampa, and Manicina after Bourne. 



Fig. 5. Diagram of Aiptasia diaphana, after Bourne. 



Fig. 6. Gonactinia prolifera, after Bourne. 



