PLATE XXV. 



Fig. 1. Suberites spiralis ; natural size, .... 



Fig. 2. Amphilectus ceratosus ; natural size, 



Fig. 3. Amphilectus pilosus {K.evg\xe\Q\i) ; natural size, . 



Fig. 4. Axiyiella (f) paradoxa ; o, oscula ; natural size, . 



Fig. 5. Cliona dissvmilis, pore-bearing side ; natural size, 



Fig. 5a. Osculum-bearing side ; natural size. 

 Fig. 56. Osciila {u) ; x 3. 

 Fig. oc. Poie-areas {p.'i.); x 3. 



Fig. 5r/. Vertical section of the oorallum, showing the spaces occupied by the sponge ; 

 natural size. 



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