In 1910 L. Glauert described this new species of Sthenurus, the type being a nearly complete mandible, with, all the teeth in place, from the Mammoth Cave, Western Australia. Later B. H. Woodward announced the discovery at the same place of two skulls of the new species, which, however, were not described.
Being engaged on a revision of the macropod genera Sthenurus and Procoptodon, I desired to examine these skulls, and, on my communicating with Mr. Glauert, he very generously forwarded the two specimens for examination and description. I am also indebted to Mr. H. H. Scott; Curator of the Queen Victoria Museum, Launceston, for the loan of a damaged skull from King Island, Tasmania, which supplements in an important manner the data obtained from the two Western Australian specimens. I am very grateful to these two gentlemen, and to the governing bodies of the Western Australian Museum and the Queen Victoria Museum for the privilege of examining the skulls, and also for their kind permission to extract the permanent premolar, which is of diagnostic importance.