Plate 1. 



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1. Hyalonema pateriferum, Spinose diact from marginal fringe ; x 400. 



Pinule from oscular (gastral) surface ; x 400 



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Dermal pinule ; x 400. 

 Mesamphidisc ; x 600. 

 Macramphidisc ; x 400. 

 Macramphidisc; x 400. 

 Macramphidisc; x 400. 

 Micro-oxyhexact ; x 600. 

 Micro-oxyhexact; x GOO. 

 Amphidisc with 4-rayed umbels; x 400. 

 Amphidisc with 4-rayed umbels ; x 400 

 From a photograph ; \. 

 From a photograph ; -fa. 



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