ClipArt ETC
"Transverse section through a zooid of Cladocora. The corallum shaded with dots, the mesogloca represented by a thick line. Thirty-two septa are present, six in the entocoeles of the primary cycle of mesenteries, I; six in the entocoeles of the secondary cycle of mesenteries, II; four in the entocoeles of the tertiary cycle of mesenteries, II, only four pairs of the latter being developed; and sixteen in the entocoeles between the mesenterial pairs. D, D, Directive mesenteries; st, stomodaeum." — The Encyclopedia Britannica, 1910

Cladocora

"Transverse section through a zooid of Cladocora. The corallum shaded with dots, the mesogloca represented…