PLATE Vlll. 



Fig. 1. A specimcu of Cacuspongia dcndroidea, var. dura ; utitural size. 



Fig. 2. Portion uf a .section through the peripheral part of the body of Caco- 

 spongia dendroides, var. friahllitf, showing numerous algoid 

 roTnid l)odies and dumb-l)cll shaped corpuscles, . . . x 700 



Fig. ."). A duml)-l)ell shaped corpuscle; highly magnified. 



Fig. 4. A filament of Stehspongos longispinns, . . . . x 400 



Fig. 5. A filament of Cacosioongia irregidarin, . . . . x 400 



