POIUFKUA [sponges]. 



27 



" floricoine ■" spicule, is cliar.icteri.stic uf Eiiplecivllid Six.ng.-fi ( Fij^. Cc ). h.^... 

 The peculiar circiihu- holes in the wtill of tiie spuujre aihiw of din- •** 

 communication between the outside and the interior. Tlie lai 



Fig. 7. 



<• 



Spicules of Glass Sponges (magnified). In the centre u notle cf the Dictyonine mtwork «f n 



Yentriculito Sponge. 



,i;astral cavity is clused at the sniiiniit hyasieve-plate. K. (is/HTi/illuin 

 is obtained from a depth of '.•<> fathdms n(T Cilni, IMiilippines. The 

 ma<^nificcnt Kuiilortella inijicrialis (Fiij. .'» ; and 8i)eciinens in 



