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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 possessdoi:10.1080/00222930908692647 fatcat:hydr62j4nze5vafmpxdbvosvou