MACROPUS OCYDROMUS, Gow. West-Australian Great Kangaroo. Heaps or 4 Mae anp a FEMALE, LIFE-SIZE. Ir the letterpress annexed to the succeeding Plate, containing reduced figures of this species, be referred to, sufficient reasons will be found for figuring life-sized heads of the two sexes of the West-Australian Kangaroo. On comparing Macropus major and M. Ocydromus, it will be seen that a very considerable difference exists between the two animals—the deep vinous colouring of the entire body, deep brown hue of the nose, and the black mark at the base of the ears, which are peculiar to the latter, being very striking, and rendering it con- spicuously distinct from its near ally: the opinion that they are really different species is moreover strengthened by the circumstance of the one being an inhabitant of the western, and the other of the eastern parts of the great continent of Australia; and from what we have seen im so many other instances of representative species, we might naturally expect this would be the case. For a more detailed account of the Macropus Ocydromus, the reader is referred to the pages given with the entire figures of the animal. Ee TT