128 MR. C. W. ANDREWS AND OTHERS ON THE [Feb. 20, 



Order Tetractinellida. 



6. Sidonops picteti Topsent. 



7. Ecionema bacilliferum (Carter). 



8. SteUetta simplicifurca (Sollas). 



9. Tetilla bacca (Selenka). 



10. Tetilla tematensis Kieschnick. 



Order Monaxonida. 



Suborder Hadromerina. 



Section Glavulida. 



11. Spirastrella caraosa Topsent. 



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



13. Pseudosvbe.rites andrewsi, sp. n. 



Section Acicnlida. 



14. Tethya ingalli Bowerbank. 



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



16. Tethya affinis, sp. n. 



Suborder Halichondrina. 

 Family Axinellid;e. 



17. Hymeniacidon conulosum (Topsent). 



Family Pojcilosclerid^:. 



18. Microciona dubia, sp. n. 



19. Iotrochota bacxdifera Bidley, var. tvmescens, var. nov. 



20. Esperella pellucid a Bidley. 



21. Desmacella sp. 



22. Stylotella irregularis, sp. n. 



23. Stylotella, sp. 



Family Haplosclerid*. 



24. RhizochaUna pellucida Bidley. 



25. RhizochaUna sessilis, sp. n. 



26. Gellius varius (Bowerbank). 



27. Reniera innominata, sp. n. 



28. Petrosia exigua, sp. n. 



29. Halichondria solida Ridley & Dendy. 



30. TJalichondria solida, var. rugosa Bidley & Dendy. 



Order Monocebatiba. 



31. Spongia {Euspongia auct.) sp. 



32. Spongelia sp. 



