Dictionary entry

Cephalaspis

Webster's Dictionary 1913

‖Ceph′a‐las″pis (?), n. [NL., fr. Gr. κεφαλή head + � a shield.] (Paleon.) A genus of fossil ganoid fishes found in the old red sandstone or Devonian formation. The head is large, and protected by a broad shield-shaped helmet prolonged behind into two lateral points.