SPOxWGES 



nt.osc. 



3 



Fig. 20. 



A. Kiiryphgma (Utriculare, F.E.S. F., PoHopojoii amwloii, W. Tli. C, Canlophacus clegans, 

 F.E.S. All three after Sclmlze. A, reduced A ; i>', 4 ; C, natural size. 



unique amongst sponges in possessing an inhalant tube of this kiml, 

 doubtless advantageous to the sponge, living as it does partially 

 buried in the soft ooze. 



Having considered the chief types of form which the sponge 



> 





Fio. 21. 

 h'arrca facuiula, O.S. (After Agassiz.) 3. 



^—P 



.J 



