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"One of the Acalephae; a name given to a large number of marine animals; and redpresenyted chiefly by medusidae."-Whitney, 1902

Acaleph

"One of the Acalephae; a name given to a large number of marine animals; and redpresenyted chiefly by…

"The under surface, showing the mouth in the center, surrounded by the tentacula, and overial chambers exterior to the origins of these." — Chambers' Encyclopedia, 1875

Acalephae

"The under surface, showing the mouth in the center, surrounded by the tentacula, and overial chambers…

"Side-view, showing the tentacula hanging down in their natural position." — Chambers' Encyclopedia, 1875

Acalephae

"Side-view, showing the tentacula hanging down in their natural position." — Chambers' Encyclopedia,…

"One of the commonest species, and must have been observed by those who frequent the sea-shore. In the water the creature swims along most gracefully by the contractoin and dilatation of its transparent disk." — Goodrich, 1859

Medusa, aurita

"One of the commonest species, and must have been observed by those who frequent the sea-shore. In the…

"a, tentacula; b, mouth; c, termination of intestine." — Chambers' Encyclopedia, 1875

Beroe

"a, tentacula; b, mouth; c, termination of intestine." — Chambers' Encyclopedia, 1875

"A, a hydriform person giving rise to medusiform persons by budding from the margin of the disc; B, free swimming medusa (Steenstrupia of Forbes) detached from the same, with manubrial genitalia (Anthomedusae) and only one tentacle." — Encyclopedia Britannica, 1893

Corymorpha

"A, a hydriform person giving rise to medusiform persons by budding from the margin of the disc; B,…

"Vacnolated endoderm cells of eartilaginous consistence from the axis of the tentacle of a Medusa (Cunina)." — Encyclopedia Britannica, 1893

Endoderm Cell

"Vacnolated endoderm cells of eartilaginous consistence from the axis of the tentacle of a Medusa (Cunina)."…

Four representations of men with ensis falcati.

Ensis falcatus

Four representations of men with ensis falcati.

A free-swimming jellyfish of the Class Scyphozoa.

Jellyfish

A free-swimming jellyfish of the Class Scyphozoa.

Jellyfish are generally of the hydrozoa family.

Jellyfish

Jellyfish are generally of the hydrozoa family.

"Medusa" — Gayley, 1893

Medusa

"Medusa" — Gayley, 1893

"Medusa" — Gayley, 1893

Medusa

"Medusa" — Gayley, 1893

"Distinguished by their habit of forming a tube or case, within which the soft parts of the animal can be retracted. This tube is usually attached to stones or other submarine bodies. It is often composed of carious foreign materials, such as sand, small stones, and the debris of shells, lined internally with a smooth covering of hardened mucus." — Goodrich, 1859

Terebella medusa

"Distinguished by their habit of forming a tube or case, within which the soft parts of the animal can…

"Ocellus of a medusa (Lizzia Koellikeri). oc, pigmented ectodermal cells; l, lens." — Encyclopedia Britannica, 1893

Ocellus

"Ocellus of a medusa (Lizzia Koellikeri). oc, pigmented ectodermal cells; l, lens." — Encyclopedia…

"This may be considered as one of the greatest wonders of nature, it being a real animal, having blood, and feeding upon other marine animals, yet having the form of a plant, and living like a plant, fixed to a rock in the deep sea." — Goodrich, 1859

Medusa's head pentacrinus

"This may be considered as one of the greatest wonders of nature, it being a real animal, having blood,…

"Perseus" — Gayley, 1893

Perseus

"Perseus" — Gayley, 1893

"Perseus with Head of Medusa" — Gayley, 1893

Perseus

"Perseus with Head of Medusa" — Gayley, 1893

"Physalia has no proper mouth, but the food is conveyed to the digestive cavity through a number of flask like appendages, which hang down beneath, each having an orifice and a sort of sucker." — Chambers' Encyclopedia, 1875

Physalia

"Physalia has no proper mouth, but the food is conveyed to the digestive cavity through a number of…

"A hydroid colony of six polyps; f, feeding polyp; r, reproductive polyp; m, a medusa." —Davison, 1906

Polyp

"A hydroid colony of six polyps; f, feeding polyp; r, reproductive polyp; m, a medusa." —Davison,…

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella; g, entric cavity. In A an invagination of the ectoderm, which is more complete in B, represents the rudiment of the sub-umbrella space." — Encyclopedia Britannica, 1893

Sporosac

"Two female sporosacs (degenerate medusae) of Hydraetinia echinata. a, ectoderm; b, endoderm; o, eggcella;…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Medualform person still attached by a stalk at the aboral pole to a colony." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Modified medusiform person, with margin of the disc (umbrella) united above and importforato (mouthless) manubrium." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac, with imcomplete extension of the enteric cavity into the umbrella,-rudimentary invagination above to form the sub-umbrella cavity." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac with manubrial portion only of the enteric cavity." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric cavity and its continuations; the lighter shading represents the genital products (ova or sperm). Sporosac without any trace of manubrium." — Encyclopedia Britannica, 1893

Sporosae

"Gradual degeneration of the medusa bud into the form of a sporosae. The black represents the enteric…

The terebella medusa, out of its case.

Terebella medusa out of its case

The terebella medusa, out of its case.