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"In these animals, which generally appear like small slugs, the branchiæ are arranged along on each side of the back; the tentacles are not retractile; some species have a very singular appearance, the body being slender, and the gill-tifts supported at the extremities of lateral footstalks." — Goodrich, 1859

Eolis papillosa

"In these animals, which generally appear like small slugs, the branchiæ are arranged along on…