DESCRIPTION OF PLATES XXVII. to XXXVIII. 



The figures cm Plate J*(XVII. are reproduced from photograplis made by the Author ; the rest of the 

 figures are reproductions of drawings made by the Author with the Abbe drawing apparatus. All the 

 figures are reduced from these drawings, most of them to two-fifths of the size of the originals ; the 

 final magnification is marked on each figure. 



The letters on the Spicule drawings correspond with those used in the text to indicate the different 

 sorts of spicules. 



N.B. — Hair spicules, which occur in many of the sponges, are not shoiun in the figures. 



The significance of the letters on the other drawings is given in the following list : — 



LIST OF FIGURES. 



1. Dennatreton /ini/cffsn))i. 



2. Megapogon crisjiii/iin. 



3. Streptoconus australis. 



4. Achramorplia grandinis. 



5. Dermatretnn cliartaceum. 

 0. Leucandra frig Ida. 



7-8. Achramorpha nivalis. 

 9. Tenthrenodes scotti. 

 10-11. Hgpodictgon Jnngstaffi. 

 12-13. Leucosolenia discovery i. 

 11-l.T. „ minchini. 



16-27. Tenthrenodes srolti. 

 28-32. „ antarcticus. 



33-34. Leucandra primigenia \ 



torap/iis. 

 3.5-10. Leinandrafrigida. 

 41-43. „ brumalis. 



Icp- 



44-53. Leucandra gelatinosa. 



54-()C. „ cirrala. 



hl-bS. „ hiberna. 



59-64. Dermjitreton chartaceum. 



65-74. „ hodgsoni. 



75-80. Streptoconus australis. 



81-97. Hgpodictgon longstaffi. 

 98-1 02. Achramoipha glacialis. 

 103-104. „ grandinis. 



105-112. „ nivalis. 



113. Grantiopsis cylindrica. 



114. Megapogon cruciferu,s. 

 115-119. „ viUosus. 

 120-124. „ raripilus. 

 125-130. „ pollimris. 

 131-130. „ crispatus. 



137. Sgcoii ienellum. 



