"Portion of a colony of <em>Corallium rubrum</em>, showing expanded and contracted zooids. In the lower part of the figure the cortex has been cut away to show the axis, ax, and the longitudinal canals, lc, surrounding it." &mdash;Encyclopedia Britannica, 1910

Colony of Collarium Rubrum

"Portion of a colony of Corallium rubrum, showing expanded and contracted zooids. In the lower…