Spicules of Glass Sponges (magnified). In the centre a node of the Dictyonine network of a 
Yentriculite Sponge. 
gastral cavity is closed at the summit by a sieve-plate. E. aspergillum 
is obtained from a depth of 90 fathoms off Cebu, Philippines. The 
magnificent Euplectella imperialis (Fig. 5 ; and specimens in 
PORIFERA [SPONGES]. 
“ floricome ” spicule, is characteristic of Euplectellid Sponges (Fig. 6c). High Case 
The peculiar circular holes in the wall of the sponge allow of direct ^^case 
communication between the outside and the interior. The large 2 a, b. 
Fig. 7. 
