Source : Webster's Revised Unabridged Dictionary (1913)

Cephaloptera \Ceph`a*lop"te*ra\, n. [NL., fr. Gr. ? head + ?
   wing.] (Zo["o]l.)
   One of the generic names of the gigantic ray ({Manta
   birostris}), known as {devilfish} and {sea devil}. It is
   common on the coasts of South Carolina, Florida, and farther
   south. Some of them grow to enormous size, becoming twenty
   feet of more across the body, and weighing more than a ton.