FIGS. t»-22.— SOME TYPICAL GLASS" SPONGES 



Fig. 19. — A tree-like species { IVa/ieria leuck- Fig. 20. — The Cactus Sponge (AcaniJiascus 



hardti Ijima). cactus Schulze). 



Fig. 21. — Venus's Flower-basket {Euplectella Fig. 22. — A " Glass-rope " Sponge (/^'a/^«^>na 



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

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