PLATE XV 



Fig. I . Sarsia gracilis Browne. Lateral view of a tentacle belonging to 

 an adult. 



Figs. 2-3. Hybocodon unicus (Browne). 

 Fig. 2. Lateral view of the medusa. 

 Fig. 3. Diagram of the margin of the umbrella. Oral view. 



Fig. 4. Staurocladia vallentini (Browne). Lateral view of a tentacle; 

 type-specimen. 



Figs. 5-6. Podocoryne tenuis (Browne). 

 Fig. 5. Lateral view of medusa, with medusa-buds. 

 Fig. 6. Mouth expanded. 



Figs. 7-14. Bougainvillia macloviafia Lesson. 



Fig. 7. Lateral view of an intermediate stage. 



Fig. 8. Lateral view of a very early stage. 



Fig. 9. A transverse optical section of the umbrella of a young stage, 

 showing the interradial and perradial furrows in the 

 umbrella, and the internal adradial ridges. 



Fig. 10. A compound basal bulb, with a single row of tentacles. Inter- 

 mediate stage. Oral view. 



Fig. II. A compound basal bulb, with a double row of tentacles 

 (which are vigorously contracted), of a fully grown adult. 

 Oral view. 



Fig. 12. The oral tentacles of an early stage. 



Fig. 13. An oral tentacle of a fully grown adult (umbrella 12 mm. in 

 length and width). 



Fig. 14. Lateral view of the oral tentacles showing their relation to the 

 mouth. 



