PLATE 19. 



Agalma elegans. 



Fig. 1. General view of a colony 10 mm. long. From a photograph. 



Fig. 2. Nectophore. X 10. 



Fig. 3. Lateral view of same. X 10. 



Fig. 4. One of the older bracts. X 10. 



Stephanomia bijuga. 



General view of a colony 45 mm. long. From a photograph. 



Lateral view of a nectophore. X 12. 



Ventrobasal view of same. X 12. 



Mature bract. X 12. 



A segment of the siphosome, to show the successive development of palpons in the inter- 

 nodes. From a photograph. X 10. 



Fig. 10. A mature tentillum. X 30. 



Fig. 11. A young colony, 11 mm. long, still bearing the primary siphon and tentacle. 



