Category:Gymnophthalmata

Gym`noph*thal"ma*ta, n. pl. Etym: [NL., fr. Gr. gymno`s naked + (Zoöl.)

Defn: A group of acalephs, including the naked-eyed medusæ; the hydromedusæ. Most of them are known to be the free-swimming progeny (gonophores) of hydroids.