PLATE LIV. 



FIG. 



1. CELLEPORA PUMICOSA, p. 398; zooecia from the 



margin of the colony. 



la, Ib. - - , adult zooecia,^ showing the form of the 



rostrum. 



2. , zooecium with punctured 'ovicell. 



3. , nat. size ; nodulated form on shell, 



ovoid on stem. 



3a. , ditto, on stone. 



4, 5. CELLEPORA AVICULARIS, p. 406. 



6. - - , large conical avicularium. 



7-9. CELLEPORA TUBIGERA, p. 409 ; from Crag speci- 

 mens, after Busk. 



10, 11. CELLEPORA ARM ATA, p. 410. 



12. , rostrum. 



13. - , spatulate avicularium. 



