3086570 Egg case of catshark (Scyliorhinus), 1923 (litho) by Millot, Adolphe Philippe (1857 ??1921); (add.info.: Catsharks are ground sharks of the family Scyliorhinidae. They are one of the largest families of sharks with around 160 species placed in 17 genera.[2] Although they are generally known as catsharks, many species are commonly called dogfish or gato. They feed on benthic invertebrates and smaller fish.); Prismatic Pictures ; French, out of copyright.