from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. A genus of fossil fishes, typical of the family Cephalaspididæ.
Sorry, no etymologies found.
Another of the families of the ichthyolites of the Old Red Sandstone -- the cephalaspis -- seems almost to constitute a connecting link between fishes and crustaceans.
As the pterichthys and coccosteus are the characteristic ichthyolites of the Lower Old Red formation, so the cephalaspis distinguishes the middle or coronstone division of the system in England.
Some of the fossils of this system, -- the cephalaspis, coccosteus, pterichthys, holoptychius -- are, in form and structure, entirely different from any fishes now existing, only the sturgeon family having any trace of affinity to them in any respect.
The cephalaspis may be considered as making the smallest advance from the crustacean character; it very much resembles in form the asaphus of lower formations, having a longish tail-like body inserted within the cusp of a large crescent-shaped head, somewhat like a saddler's cutting-knife.