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 Engina armillata ( Reeve, 1846:111 ) ( Figure 4I, J ) Description Shell biconical, thick with axial ribs crossed by spiral grooves creating rows of granules. White with spiral, thin dark bands. Aperture white with denticles on the outer lip. Type locality ‘‘Indo O, Pacifique’’, Indian Ocean, Pacific. Distribution Indo-Pacific, South China Sea. Occurs under stable boulders and feeds on serpulid polychaetes ( Tan and Morton 1998 ). Bivalve endobenthos of the cave floor sediments