Plate 12 



Figs. 1-4. Diaperoecia? subpapyracea, new species (p. 50). 



1. Superposed colonies, X 4, arising from many successive larvae. 



2. A large isolated colony, X 12, showing the arrangement of 



the tubes in radial rows and the large smooth basal lamella. 



3. A small isolated colony, X 12, showing the irregular arrange- 



ment of the peristomes. 



4. Portion of an incrusting colony, X 12, illustrating the mar- 



ginal ovicell. 

 Albatross Station D. 2813. 

 5-9. Diaperoecia meandrina, new species (p. 51). 



5. Superior face, X 4, showing the zoarial reticulations, the basal 



lamella, and the great saliency of the superior tubes. 



6. Base of the same zoarium, X 4. The primitive Berenicea is 



visible, as is also the point of attachment. 



7. Dorsal of a young branch, X 12. It is formed from the prin- 



cipal branch by a bifurcation of the basal lamella in which 

 the two parts are attached back to back. 



8. Lateral face of an ovicelled branch, X 12, showing the inser- 



tion of a secondary branch. 



9. Lateral view of a young ovicelled branch, X 12, illustrating 



the growth of the basal lamella by the addition of new 

 recurved tubes. Sometimes the tubes are closed by a 

 diaphragm with a tubule. 

 Albatross Station D. 2815. 



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