Protorosaurus speneri, a lizard-like reptile, and Menaspis armata, an extinct genus of holocephalian cartilaginous fish. Both from the Permian. Colour printed (chromolithograph) illustration by F. John from "Tiere der Urwelt" Animals of the Prehistoric World, 1910, Hamburg. From a series of prehistoric creature cards published by the Reichardt Cocoa company.