Raja clavata. The Thornback.

Date 1796.
Source http://www.flickr.com/photos/biodivlibrary/7064437673
Author Marcus Elieser Bloch
Full title Ichthyologie; ou, Histoire naturelle des poissons : En six parties avec 216 planches dessinées et enluminées d'après nature / par Marc Éliéser Bloch.
BHL Page URL http://www.biodiversitylibrary.org/page/4786686
Source: https://commons.wikimedia.org/wiki/File:Ichthyologie;_ou,_Histoire_naturelle_des_poissons_(Plate_83)_(7064437673).jpg

The thornback ray or thornback skate (Raja clavata) is a species of fish in the Rajidae family. Raja clavata is found in coastal waters of Europe and the Atlantic coast of Africa, possibly as far south as Namibia and even South Africa.