52 



INDEX. 



New families, 2, 3. 

 New genera described, 4. 



„ table, 2. 

 Oscular collar defined, 5. 

 Oscule defined, 5. 



„ closed in different ways, 45. 

 Oscnles, histology, 44. 

 Ostia defined, 5. 



„ histology, 44. 

 Ova, 48. 



„ duplicate, 6, 48. 

 poUicaris, Megapogon, 40. 

 Ports defined, 5. 

 Pore defined, 5. 

 Pores, histology, 44. 

 primigenia, Leucandra (Leucetta), 14. 

 primordialis, Glathrina (Ascetta), 6. 

 Prosopyles defined, 5. 



„ histology, 44. 



pumila, Leucaltis, ref., 14. 

 Quadriradiates, turning round, 30, 47. 

 raripilus, Megapogon, 38. 

 Refringent spicules, 7, 9. 

 Eeproduction, 48. 



Eeticulated cortices in Dermatreton, 21. 

 scotti, Tenthrenodes, 10. 

 Spicules, histology, 4.5. 



„ hair, 48. 



„ folding, 45. 



„ flattened, 48. 



„ gamma, 7, 9, 46. 



„ how drawn, 45 



„ position in sponge, 46. 



„ tau, 46. 

 Staurorrhaphidm, definition, 29. 



„ new family, 2, 3. 



Streptoconus australis, 25. 



„ table, 2. 

 Sycantha tenella, described, 4. 

 Sycettidae, 2, 9. 

 Tau spicules, 46. 

 Terminology, definitions, 5. 

 Tenthrenodes antarcticus, 9, 12. 

 „ scotti, 10. 



„ table, 2. 



Thumb-shaped spicules, 40. 

 villosus, Megapogon, 37. 



