PLATE XXXIII. 



Somphospongia viiiltiforniis. 



1-4. Figures to illustrate the outlines of smaller specimens. 

 Less than natural size. 



5. Photograph of the top of another specimen showing the 

 canals. Less than natural size. 



6. Drawing to illustrate the thickness of the dermal laj'er. 

 Magnified. 



7. Outline of larger specimen showing mushroom-form. One- 

 half natural size. 



8. Tracing of a section through the top of one of the sponges 

 showing the arrangement of the canals, which are stippled. The 

 unstippled portion is the body of tiie sponge. Reduced one-half. 



g. Semidiagrammatic section through the cloaca of a small indi- 

 vidual showing the canals, which are stippled, and the semicon- 

 cretionary nature of the outer part of it. 



10. Portion of the surface of a weathered specimen showing 

 what appears to be the body skeleton of the sponge. Magnified. 



