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"The main stem of the polypidom of these animals is fleshy, but is furnished with an internal bony axis, which, however, does not reach to either exlamellae, which stand out upon each side of stalk, giving the whole polypidom, in some cases, the appearance of a large quill-feather. Of this the Sea-Pen, <I>Pennatula grisea</em>, is a familiar example. There are, however, many other forms." &mdash; Goodrich, 1859

Sea-pen

"The main stem of the polypidom of these animals is fleshy, but is furnished with an internal bony axis,…