Nostrils basal, sulcated; the aperture terminal, round, small, hid by bristly incumbent feathers. [Please select]
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_ Basal whirl nodulous; spire short, nearly smooth, with a sulcated line parallel with the suture; outer lip above gibbous, the margin straight; inner lip thick, both striated; aperture flesh colour; base truncated. [Please select]
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Hodgsonii_, but it differs in its much smaller size, in its deeply sulcated horns, the angles of which are very much rounded, and the terminal curve but slightly developed. [Please select]
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