[28 ICE. C. W. ANDREWS AND OTHERS ON THK [Feb. 20, 



Order Tetractinellida. 



6. Sidonops picteti Topsent. 



7. Ecionema bacillifenim (Carter). 



8. SteUetta simplicifurca (Sollas). 



9. Tetilla bacca (Selenka). 



10. Tetilla ternatengis Kieschnick. 



Order Monaxonida. 



Suborder Hadromerina. 



Section Glavulida. 



11. Spirastrella carnosa Topsent. 



L2. Spirastrella decumbens Ridley, var. robvsta, var. nov. 



13. Psevdosvberites andrewsi, sp. n. 



Section Aciculida, 



14. Tethya ingalli Rouerbank. 



15. Tethya seychellensis (E. P. Wright). 



16. Tethya ajfinis, sp. n. 



Suborder Halichondrina. 

 Family Axinellid^e. 



17. Hymeniacidon convloswm (Topsent). 



Family PoxiloscleriDjE. 



18. Microciona dubia, sp. n. 



19. lotrochota baculifera Ridley, var. tvmescens, var. nov, 



20. Esperella pelluctda Ridley. 



21. Desmacella sp. 



22. Stylotella irregularis, sp. n. 



23. Stylotella, sp. 



Family Haplosclerid.e. 



24. Rhizochalina pellvcida Ridley. 



25. lihizochcdina sessilis, sp. n. 



26. Gellius varius (Bowerbank). 



27. Reniera innominata, sp. n. 



28. Petrosia exiyua, sp. n. 



29. HalkhoixJria solida Ridley & Dendy. 



30. Halichondria solida, var. rugosa Ridley & Dendy. 



Order Mosoceba t i n a. 



31. Spongia (Euspovgia auct.) sp. 



32. Spongelia sp. 



