PLATE 13. 



Abyla haeckeli. 



Fig. 1. Lateral view of superior ncctophore. X 9. 



Fig. 2. Ventral view of same, showing ventral facet divided by transverse ridge, X. X 9. 



Abyla trigona. 



Fig. 3. Lateral view of suijerior nectophore. X 9. 



Fig. 4. Ventral view of same, showing single undivided ventral facet. X 9. 



Abyla leuckartii. 



Fig. 5. Lateral view of colony with small inferior nectophore entirely contained within the hy- 

 droecium of the large superior nectophore. X 10. 



Fig. 6. Detached inferior nectophore of same. Lateral view. X 30. 



Fig. 7. Ventral view of same. 



Fig. 8. A single cormidium still attached to the stem (St) with bract, siphon (S), tentacle, cT 

 gonophore (Go cf ), and bud for a second gonophore (Go^). X about 30. 



