
• (n.) 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.
Found on
http://thinkexist.com/dictionary/meaning/cephalaspis/

extinct genus of very primitive jawless, fishlike vertebrates found in Early Devonian rocks (the Devonian Period lasted from 408 to 360 million ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/c/46
Ceph`a·las'pis noun [ New Latin , from Greek
kefalh` 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.
Found on
http://www.encyclo.co.uk/webster/C/45
No exact match found.