[1] Margarites helicinus has been established by Phipps in 1774 and not by Fabricus in 1780 as Winchworth (1932), Sneli (1970) (and others) mention.

The surface is very bright, shining, polished, and smooth except for fine subobsolete concentric lines around the umbilicus.

Spawning takes place during the spring in the San Juan Islands, WA, USA.

The female uses the leading edge of her foot to form the mucus strand into a globular egg mass 0.5–1.5 cm in diameter.

[5][6] All embryonic and larval development takes place in the egg mass and young emerge as juvenile snails.