CLASSIFIED LIST. 



Section **. — Skeleton spioula acuate. 

 Subsection A.— Spicula smooth, dermal membrane aspioulous. 



16. Hymeniacidon perlsBvis. 



17. „ pachyderma. 



18. Hymeniacidon crustula. 



19. „ Hillieri. 



Sub-section B. — Spicula of dermis dispersed. 



Sub-section 0. — Dermal spioula reticulated or fasciculated. 



31. Hymeniacidon varians. 



32. -,, viridana. 



33. ,, aureus. 



34. Hymeniacidon armaturus. 



35. „ callosus. 



36. „ plumiger. 



Section ***.— Skeleton spicula spinulate. 

 Sub-section A. — Dermal membrane aspiculous. 



37. Hymeniacidon subereus. 



38. ,, carnosus. 



39. Hymeniacidon gelatinosus. 



40. „ foliatus. 



Sub-section B. — Spicula of dermal membrane dispersed. 



41. Hymeniacidon ficus. 



42. „ sulphurous. 



43. „ celatus. 



44. Hymeniacidon claviger. 



45. „ tenebrosus. 



Sub-section 0. — Spicula of dermal membrane reticulated or fasciculated. 

 46. Hymeniacidon subclavatus. | 47. Hymeniacidon paupertas. 



Section ****.— Skeleton spicula cylindrical. 

 48. Hymeniacidon Dujardinii. 



Genv^ XX. — Battersbyia. 

 Battersbyia Bucklandi. 



