Plate 71 



Figs. 1-6. Flabellopora elegans D'Orbigny, 1852 (p. 499). 



1. Small zoarium, X20. 



D. 5137. Jolo Light, Jolo. 



2. Medium sized colony, X20. The aperture is surrounded by a thin 



peristome. 



3. Large, much calcified zoarium, X20. 



4. Edge view of the terminal portion of zoarium, X20, showing the for- 



mation of zooecia. 



D. 5145. Jolo Light, Jolo. 



5. View of interior of zooecia, X20, illustrating the eccentric position of 



the aperture. 



D. 5137. Jolo Light, Jolo. 



6. View of the zooecia at the terminal angle of zoarium, X 20. 



D. 5144. Jolo Light, Jolo. 

 7-10. Trochosodon decussis, new species (p. 495). 



7. The cruciform zoarium, natural size. 



8. Zooecial surface of an irregular zoarium, X20, with semilunar slits 



visible. 



9. Cellular face of more regular colony, X 20. 



10. View, X20, of the finely granulose convex base. 

 D. 5237. Sanco Point, east of Mindanao. 



(638) 



