502 SYDNEY J. HICKSON. 



Fig. 9. An anthocodia of specimen D of Chironephthya variabilis sliowiiig the arrangement of the 

 spicules in the crown (C) and points (P). This arrangement is characteristic of what 

 appears to be young polyps. 



Fig. 10. An antliocodia of specimen E of Chironephthya variabilis, showing the spicules in both 

 crown (C) and points (/") larger and more crowded than in specimen D. 



Fig. 11. Arrangement of the spicules in the points of Siphonogorgia mirabilis, showing one pro- 

 minent median spicule and the others smaller and arranged in the manner of a fan on 

 each side of it. 



Fig. 12. A small piece of the terminal branch of Siphonogorgia mirabilis, the surface being covered 

 with the sponge Halisarca. Sp. cut edge of the sponge. Coen. the large spicules of 

 the coenenchym as seen when the sponge is scraped off. Anth. anthocodiae projecting 

 through the sponge. 



Fig. 13. Solenocaidon tortuosum Gray. Specimen C from Suvadiva. Nat. size. It shows t. the 

 tubular secondary branches, and b.b. the very short free terminal branchlets. 



PLATE XXVII. 



Fig. 14. Solenocaulon ramosa, n. sp. A small portion of a large colony. It shows at B.B. two 

 large belt-like growths on the main stems, and at b.b. the long free terminal non-tubular 

 branches. 



Figs. 15, 16. Two stages in the formation of the belts of Solenocaidon ramosa. 



Fig. 17. A terminal branch of Solenocaulon ramosa, n. sp., showing the non-retractile anthocodiae, 

 Anth. 



Fig. 18. A terminal branch of Sole7iocaulon tortuosum from the Maldives for comparison with 

 Fig. 17. 



