FIGS. 19-22.— SOME TYPICAL "GLASS" SPONGES 

 FIG. 19.-A tree-like specie^\m Iberia leuck- Fig. 2o.-The Cactus Sponge Acanthascus 



hardti Ijima). '"^^«^ Schulze). 



Fig 21 -Venus's Flower-basket (£«/^./^//a Fig. 22.-A Glass-rope " Sponge (^ja^;;.v/m 

 speciosissima Owen). oivstoni Ijima) with Palythoa growing on stem. 



241 



