G. CELLEPORA. 
41 
RADIATED. 
16. Cellepora radiata . Cells sub-oval, almost 
radiated, granulated, and nearly convex ; openings 
half orbicular, bordered with from four to six teeth. 
Mediterranean. 
FRINGED. 
17. Cellepora ciliata . Cells convex, with the 
opening usually divided into seven spines. 
On the European fucus. 
SIXTEEN-TOOTHED. 
18. Cellepora sedecim-dentata . Openings of the 
cells oval, and longitudinally oblique, with sixteen 
teeth on the border. 
Mediterranean. 
TWO-POINTED. 
19. Cellepora bimucronata . Cells oblong and 
nearly oval ; surface rough, with points situated in 
transverse lines ; openings nearly orbicular, with two 
opposite teeth. 
Mediterranean. 
COMMON. 
26. Cellepora vulgaris . Cells oval, convex, and 
alternate ; openings half orbicular ; lower lip slit, with 
two holes underneath. 
Mediterranean. 
ROUND-MOUTH. 
21. Cellepora cyclostoma. Cells oval, alternate, 
and slightly punctured ; openings round and entire. 
Mediterranean. 
Cor, 
F 
