scyphomedusae

from The Collaborative International Dictionary of English v.0.48

Scyphomedusae \Scy`pho*me*du"sae\, n. pl. [NL., fr. Gr. sky`fos
   cup + NL. medusa.] (Zool.)
   Same as {Acraspeda}, or {Discophora}.
   [1913 Webster]