114 



SPONGES 



fie. 



Sd tr. 



GC 



FIG. 78. 



Section of the body wall of Lathydorus fimbriatus, F.E.S. The spicules are omitted from 

 the drawing. x30. (After F. E. Schulze.) ex.c, excurrent canals. Other letters as in Figs. 

 V6, 77. 



fl.c 



Flo. 79. 



GC 



Section of the wall of Taegeria pulchra, F.E.S. The spicules are omitted. x20. (After F 

 E. Schulze.) The letters as in the three preceding figures. 



