rROCEEDINGS OF SECTION C. 



429 



Fig. 3. 

 Cross section of a small Cup, shotcing relatively small area of Central Cavity (A) and the 

 rounded " Loeuli^' (B), some occupied by brownish infilling (dotted) . The Rhizoid Tissue (R) 

 connects the fornur Cup to portion of a larger individual, of which the Perforated Walls are 

 indicated at C and D. Small strongly refractive bodies occur at E. At F a large isolated 

 Sponge Spicule is seen in the matrix. (From a microphotograph.J 



