EXPLANATION OF PLATE XL 



Fig. 10. Clathria tenuifibra, Whitelegge. 

 „ IL Clathria dura, Whitelegge. 

 „ 12. Clathria australiensis. Carter. 

 „ 13. Clathria rubens, Lendenfeld. The type (No. 286) of Thalasso- 



dendron rubens, Lendenfeld. 

 „ li. Plumohalichondria australis, Lendenfeld. The type (No. 267) 



of Clathria macropora, Lendenfeld. 



„ 14a. Plumohalichondria australis, Lendenfeld. The type (No. 278) 

 of Echinonema levis, Lendenfeld. 



„ 146. Plumohalichondria australis, Lendenfeld. The type (No. 285) 

 of Clathria australis, Lendenfeld. 



„ 15. Clathria arborea, Lendenfeld. 



„ 15a. Clathria arborea, Lendenfeld. The type (No. 346) of Plectispa 



arborea, Lendenfeld. 

 ,, 16. Ciocalypta comj^ressa, Carter. 



All the figures are reduced to about one-fourth the natural size. 



