PLATE XLI. 



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



Fig. 2. Suberites caminatus, group of specimens encrusting a fragment of 

 Sporadopora (Station 320) ; natural size, 



Fig. 3 



Suberites microstomus ; natural size, 

 Fig. 4. Suberites mollis ; x ^, . 

 Fig. 5. Spirastrella pa2nllosa ; x |, 

 Fig. 6. Polymastia agglutinans ; x 2, 

 Fig. 7. Spirastrella solida ; natural size. 

 Fig. 8. Polymastia robusta ; natural size, 

 Fig. 9. Subetites perfectus ; natural size, 



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