BRITISH SPONGIADjE. 229 



Sub-section B, Skeleton spicula, spinous. 



14. Halichondria incrustans, Johnston. 



15. — Candida, Bowerbank. 



16. — irregularis, Bowerbank. 



17. — Dickiei, Bowerbank. 



18. — Pattersoni, Bowerbank. 



19. — pulchella, Bowerbank. 



20. — Ingalli, Bowerbank. 



21. — scandens, BowerbanL 



22. — Batei, Bowerbank. 



23. — granulata, Bowerbank. 



24. — Hyndmani, Bowerbank. 



25. — Nigricans, Bowerbank. 



26. — alhula, Bowerbank. 



Section * * * Skeleton spicula, spinulate. 



27. Halichondria far inaria, Bowerbank. 



28. — inornatus, Bowerbank. 



1. Halichondria panicea, Johnston. 



Haliohokbbia sevosa, Johnston. 



Sponge. Coating massive or fistulous, very variable in 

 form, sessile ; surface smooth. Oscula simple or 

 slightly elevated ; dispersed on the surface, or collected 

 in large or small fistulous cloacae. Pores incon- 

 spicuous, numerous. Dermal membrane simple, pel- 

 lucid, abundantly spiculous; spicula either arranged 

 in rete, or irregularly dispersed. Skeleton : Spicula 

 acerate or sub-fusiformi acerate. Sarcode abundant. 



Colour. — From light ash to yellow, orange, or green of 

 various tints. 



