INDEX. 



Xew 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, 18. 



duplicate, 6, 48. 

 /inlliaii-ix, JIfi/fif Of/on, 40. 

 Ports defined, 5. 

 Pore defined, 5. 

 Pores, histology, 41. 

 jmmii/i'iiin, Li'iiruiiilni (Leucetta), 14. 

 primordial^, Chithrina (Aseetta), 6. 

 Prosopyles defined, 5. 



histology, 44. 



linniilil, Lrimiltix, ref., 14. 



(^uadriradiates, turning round, 30, 47. 



llefringent spicules, 7, 9. 

 Reproduction, 4S. 



Reticulated cortices in Dermatretnn, 21. 

 xi-ntti, Ti'Dtliri'iifxIcx. 10. 

 Spicules, histology, 4.">. 

 hair, 48. 

 folding, 45. 



flattened, 48. 

 gamma, 7, '.), 46. 

 how drawn, 45 

 position in sponge, 4(1. 



tau, 46. 

 Stdururr/iti/iliiilse, definition, 2'.. 



new family, 2, 3. 



Streptocontts austral i*, 2'<. 



table, 2. 



Syeantha tenflla, described, 4. 

 Syeettidsx, 2, 9. 

 Tau spicules, 46. 

 Terminology, definitions, 5. 

 Tenthrenodes antarcticus, 9, 12. 

 scotti, 10. 

 table, 2. 



Thumb-shaped spicules, 40. 

 /i, 37. 



