

PLATE LII. 



Fiu. 



1, 2. Cellepora pumicosa, p. 295. Of the natural size. 



3. A small specimen of 0. pumicosa magnified. 



4. Cellepora ramulosa, p. 296. Of the natural size. 



5. A section of a branch, magnified. 



6. Cellepora Skenei, p. 297. Of the natural size. 



7. A portion of the same magnified. 



8. A transverse section of the same magnified. 





