Shell-bearing Mollusca (Bivalvia and Gastropoda) from submarine caves in Hong Kong Author Lam, Katherine Author Morton, Brian Author Leung, K. F. text Journal of Natural History 2008 2008-03-31 42 9 - 12 927 952 http://dx.doi.org/10.1080/00222930701862674 journal article 10.1080/00222930701862674 1464-5262 5225019 Gyrineum natator Ro " ding, 1798 Description Shell brown, depressed dorso-ventrally, covered with thick, round, black nodules regularly spaced on both sides. Axial ribs between varices crossed by spiral grooves and nodules. Thick outer lip corresponds to the last varix. Aperture white. Type locality None designated. Distribution Common in the Indo-Pacific. Lower region of rocky shores to the subtidal zone.