154 A MONOGRAPH OP THI& 



Hymeniacidon, Bowerbank. 



Section * Skeleton spicula, acerate. 



1. Hymeniacidon Thomasii, Bowerbank. 



2. coccinea, Bowerbank. 



3. Brettii, Bowerbank. 



4. fragilis, Bowerbank. 



5. reticulatus, Bowerbank. 



6. fallaciosus, Bowerbank. 



7. albescens, Bowerbank. 



8. lactea, Bowerbank. 



9. perarmatus, Bowerbank. 



10. membrana, Bowerbank. 



Section * * Skeleton spicula, acuate. 



Sub-section A. Skeleton spicula, smooth. 



11. Hymeniacidon caruncula, Bowerbank. 



12. sanguinea, Bowerbank. 



13. mammeata, Bowerbank. 



14. consimilis, Bowerbank. 



15. - variantia, Bowerbank. 



16. macilenta, Bowerbank. 



17. fallax, Bowerbank. 



18. viridans, Bowerbank. 



19. perlevis, Bowerbank. 



20. aurea, Bowerbank. 



21. armatura, Bowerbank. 



22. pachyderma, Bowerbank. 



23. crustula, Bowerbank. 



24. lingua, Bowerbank. 



25. Jloreum, Bowerbank. 



26. virgultosa, Bowerbank. 



Sub-section B, Skeleton spicula, spinous. 



27. Hymeniacidon plumosa, Bowerbank, 



28. jecusculum, Bowerbank. 



