The Collaborative International Dictionary of English v.0.48:

Ganocephala \Gan`o*ceph"a*la\, prop. n. pl. [NL., fr. Gr. ?
   brightness + ? head.] (Paleon.)
   A group of fossil amphibians allied to the labyrinthodonts,
   having the head defended by bony, sculptured plates, as in
   some ganoid fishes.
   [1913 Webster]