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. 

 pollkaris, Megapogon, 40. 

 Ports defined, 5. 

 Pore defined, 5. 

 Pores, histology, 44. 

 primigenia, Leucarulra (Leucetlti), 14. 

 primordialis, Clathrina (Ascettci), 6. 

 Prosopyles defined, 5. 



histology, 44. 

 pumila, Leucaltis, ref., 14. 

 Quadriradiates, turning round, 30, 47. 

 raripilus, Megapogon, 38. 

 Kefringent spicules, 7, 9. 

 Reproduction, 48. 



Reticulated cortices in Dermatreton, 21. 

 scotti, Tenthrenodes, 10. 

 Spicules, histology, 45. 

 hair, 48. 

 ,, folding, 45. 

 flattened, 48. 



gamma,- 7, 0, 46. 

 how drawn, 45 

 position in sponge, 46. 

 tau, 46. 

 Staurorrhaphidse, definition, 29. 



new family, 2, 3. 



Streptoconus australis, 25. 



table, 2. 



Sycant/ta tenella, described, 4. 

 Sycettidse, 2, 9. 

 Tau spicules, 46. 

 Terminology, definitions, 5. 

 Tenthrenodes antarcticus, 9, 12. 

 scotti, 10. 

 table, 2. 



Thumb-shaped spicules, 40. 

 villosus, Megapogon, 37. 



