part of the last two whorls is deeply channelled. The tubercles forming the coronation are hollow spiues, and far more numerous, almost double the number of the nodosities in nivosa. The ground-colonr is salmon-red and the white markings take the form of flecks or splashes rather than of spots and dots. The aperture is large and whiter within, and the columellar folds are white. V. nivosa, V. irvlnce, V. oblita ( =norrlsli, auct., nec Gray), and IT. sophia form a group of species which possess

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... cies which possess some features in common~ namely, the radiating brown lines upon the spire, the coronated who rls~ brown or reddish lineation on the anterior fasciole~ and two transverse co]our-bands, more or less lineated except in IT. sophia, and they all exhibit white spotting or mottling upon the rest of the surface of the body-whorl. This is not seen in any of the published figures of V. soTMa , but it does occur in some examples. It becomes a question of regarding these four forms as distinct or as local races of one species with a wide geographical range upon the north and west coasts of Australia.