Chlamydosaurus

Chlamydosaurus, the Frilled Lizard of Australia, is a lizard with an extraordinary frilled membrane attached to the hinder part of the head, neck, and chest, and covering its shoulders. This lies in plaits when at rest, but is expanded when the animal, which may be three feet long, is irritated or frightened. The creature, which is allied to the Iguanidae, can run for forty feet with its fore-feet and tail in the air, and seems in this respect to resemble some of the extinct gigantic lizards. See a long article, with illustrations, in Nature for February 1896.