EXPLANATION OF PLATE XVI. 



Keroeides gracilis, sp. nov. 



Pig. 1. Colony. Nat. size. 



2. Cortical spicule. 



3. Polyp spicule. 



4. Operculate spicule. 



5. Portion of the axis. 



Acanthogorgia breviflora, sp. nov. 



Fig. 6. Colony. Nat. size. 



7. Cortical spicule. 



8. Polyp spicule. 



9. Coronal spicule. 



10. Collar spicule. 



Anthomuricea simplex, sp. nov. 



Fig. 11. Colony. Nat. size. 



12. Cortical spicule. 



13. Deep-seated polyp spicule. 



14. Collar spicule. 



15. Operculate spicule. 



Villogorgia flagellata, sp. nov. 

 Fig. 16. Cortical spicule. 

 17. Polyp spicule. 

 18. ditto. 

 19. Coronal spicule. 

 20. Operculate spicule. 



