Mantle is thin and almost transparent over the visceral mass.
1: epipodial tentacle. 2: large epipodial tentacle.
3: thickened edge of mantle. 4: sensory papillae on mantle edge.
5: contracted cephalic tentacle. 6: ctenidium.
7: horseshoe shaped pedal retractor muscle. 8: end of pedal retractor muscle. 9: kidney. 10: gonads. 11: digestive gland.
12: kidney. 13: expanded edge of snout. (Features inferred from figures of Emarginula and Diodora in Fretter & Graham, 1962.)
Full SPECIES DESCRIPTION at flic.kr/p/2odgEy1
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