EXPLANA^TION OP PLATE XIII. 



Fig. 23. Hippospongiri molliasiina, Lendenfeld. 



,, 24. Coscinodenna densa, Hyatt. 

 .. 24a. 



,, 25. Tlwrccta pMlmata, Hyatt. 

 ,, 2oa. ,, ,, ,, 



„ 26. Thorecta radiatus, LeuJent'eld. 



,, 27. Coscinoderma lanuginosa, Carter. 



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



