——— cygnea. Spengler. Skrifter Naturhist. Selbskabet, Bd. i, 1790, Tab. vi, fig. 8.
——— dilata. Donovan. British Shells, 1804.
Pentalasmis fascicularis. Brown. Illust. Conch., 1844, Pl. li, fig. 2.
————— spirulicola (!) et Donovani (!) Leach. Tuckey’s Congo Expedit., p. 413, 1818.
Anatifa vitrea. Lamarck. Animaux sans Vertebres.
Dosima fascicularis. (!) J. E. Gray. Annals of Philosophy, vol. x, 1825.
Pentalepas vitrea. Lesson. Voyage de la Coquille. Mollusca, Pl. xvi, fig. 7, 1830.
Anatifa oceanica (!) Quoy et Gaimard. Voyage de l’Astrolabe, Pl. xciii.
L. valvis glabris, tenuibus, pellucidis; carinâ rectangulè flexâ, parte inferiore in discum planum oblongum expansâ.
Valves smooth, thin, transparent; carina rectangularly bent, with the lower part expanded into a flat oblong disc.