from The Century Dictionary.
- noun A. genus of cestraciont sharks known chiefly by the pavement-teeth. They occur in the Jurassic and Cretaceous formations.
Sorry, no etymologies found.
There are many fishes, some of which (acrodus, psammodus, &c.,) are presumed from remains of their palatal bones, to have been of the gigantic cartilaginous class, now represented by such as the cestraceon.