1: inhalant water enters the mantle cavity anterolaterally.
2: exhalant siphon protrudes through the shell-slit.
3: exhalant water after passing over ctenidia in mantle cavity. Also conveys out sperm or ova, faeces and excreta.
4: epipodial tentacles protruding beyond shell to detect approaching threats.
L. 5.8 mm, W. 4.6 mm, H. 3.2 mm, Menai Strait, Wales, March 2015.
Full SPECIES DESCRIPTION at flic.kr/p/2odgEy1
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