Keyword: "hellianthoida" | ClipArt ETC

"It is to this family more especially that the formation of the coral reeds is to be attributed. In this the corals usually form thick stony masses; the stony rays of the cells are exceedingly numerous, and the cels themselves penetrate deeply into the mass of coral, although they are generally partially divided by imperfect transverse paritions." — Goodrich, 1859

Astraea rotulosa

"It is to this family more especially that the formation of the coral reeds is to be attributed. In…

"These animals are generally called <em>Tree-corals</em>, on account of the forms of the polypidons which they build and in which they live. They are very small, and possess twelve short tentacles placed in a circle around the mouth; they occupy the cells in the polypidom, which is of a porus nature, the openings of the cells being placed at the summits of tubercular prominences of greater or lesser elevations. " — Goodrich, 1859

Tree-coral

"These animals are generally called Tree-corals, on account of the forms of the polypidons…

"a a, expanded polypes; b b, polypes withdrawn into their cells; c c, coral uncovered by flesh, showing the cells. In this the corals usually form thick stony masses; the stony rays of the cells are exceedingly numerous, and the cells themselves penetrate deeply into the mass of coral, although they are generally partially divided by imperfect transverse partitions." — Goodrich, 1859

Astrae virdis

"a a, expanded polypes; b b, polypes withdrawn into their cells; c c, coral uncovered by flesh, showing…