The Collaborative International Dictionary of English v.0.48:

Euganoidei \Eu`ga*noi"de*i\, n. pl. [NL., fr. Gr. e'y^ well +
   NL. ganoidei. See Ganoid.] (Zo["o]l.)
   A group which includes the bony ganoids, as the gar pikes.
   [1913 Webster]