Source : Webster's Revised Unabridged Dictionary (1913)

Myxocystodea \Myx`o*cys*to"de*a\, n. pl. [NL., fr. Gr. ? mucus +
   ? a bladder.] (Zo["o]l.)
   A division of Infusoria including the Noctiluca. See
   {Noctiluca}.