Achnanthidium coarctatum coarctata Brébisson
| I.—Notes of an excursion to the South of France and the Auvergne in search of Diatomaceæ William Smith (1855) Annals And Magazine of Natural History 15: 1-9 | |
| II.—Amended characters of the singular lymneadous genus Camptoceras, and description of a new Ancylus, inhabitants of North-western India W H Benson (1855) Annals And Magazine of Natural History 15: 9-13 |