Plate 52 



Figs. 1, 2. Adeona arculifera, new species (p. 377). 



1. The narrow bilamellar zoarium, natural size. 



2. Surface, X20, showing the ascopore in the middle of the frontal. 



D. 5147. Sulade Island. 

 3-8. Adeonella gibbera, new species (p. 381). 



3. The narrow bilamellar young frond, X20, on which the aperture, 



the spiramen, and the avicularium are placed in the same depression. 

 D. 5162. Tinagta Island. 



4. Another young frond, X20, where the marginal zooecia show a regular 



tremocyst. 



D. 5179. Romblon Light, Romblon. 



5. Adult zooecium of a frond, X20. The zooecia are somewhat calcified. 



6. Much calcified zooecia, X20, near the base of a frond. 



7. Transverse section, X20. 



S. Longitudinal section, X20, through a young complete branch. 

 D. 5162. Tinagta Island. 

 9-12. Adeona articulata, new species (p. 377). 



9. Restoration of an articulated colony, natural size. 



10. Portion of .young segment, X20. The axial zooecia are similar to the 



lateral ones. 



11. Articulation, X20, showing the chitinous bundles joining two seg- 



ments. 



12. Middle portion of a segment, X20, showing the gradual thickening of 



the frontal along the zooecial axis. ' 

 D. 5151. Sirun Island. 



(619) 



