At the beginning of last year my valued correspondent, Mr. Gerard Krefft, Curator of the Australian Museum, Sydney, informed me of the discovery in Queensland of a large Lepidosiren -like animal, of which he enclosed a photograph, and which he assigned to Ceratodus , a genus of fishes known from fossil teeth only, naming the species after its discoverer, the Hon. William Forster, Ceratodus forsteri . Before my reply had time to reach Mr. Krefft, a short communication of his on the subject was read before the Zoological Society of London (April 28,1870); it is entitled “Description of a gigantic Amphibian allied to the genus Lepidosiren , from the WideBay district, Queensland” (Proc. Zool. Soc. 1870, p. 221). The author describes in this note the principal points of the external appearance and dentition, and mentions also that “ the skeleton is partly ossified, partly cartilaginous, the vertebrae being pure cartilage, and the ribs hollow tubes filled with a cartilaginous substance. The palate and upper part of the skull are bone, and the head is covered with two enormous scales.” Mr. Krefft’s specimen was evidently only roughly preserved, and the internal organs had been removed.