EXPLANATION OP PLATE XVII. 



Bebryce studeri, sp. nov. 



Pig. 21. Colony. Nat. size. 



22. Cortical spicule. 



23. Deep-seated ccenenchyma spicule from above. 



24. Ditto, in profile. 



25. Collar spicule. 



Murieella purpuroa, sp. nov. 



Pig. 26. Cortical spicule. 



27. Polyp spicule. 



28. Collar spicule. 



29. Operculate spicule. 



Nicella laxa, sp. nov. 



Pig. 30. Colony. Nat. size. 



31. Cortical spicule. 



,, 32. Deep-seated ccenenchyma spicule. 



33. Ditto. 



Verrucella flabellata, sp. nov. 



Pig. 34. Colony. Nat. size. 



35. Cortical spicule. 



36. Deep-seated flattened spicule from the ccenenchyma. 



37. Ditto, viewed from the side. 



