inequilateral

Updated: December 3, 2024

Order, Dimyaria. Genus Megadesmus. Valves equal, inequilateral, thick, their edges even; umbones nearly central; hinge sunk, with an antiquated area and one ? or two ? large teeth in each valve; ligament external, large; impressions of the abducter muscles strong, nearly equal, united by the impression of the mantle, at the posterior extremity of which is a small shallow sinus; no lunette.

Thomas Mitchell - Three Expeditions into the Interior of Eastern Australia, Volume 1

Take the shape of the normal leaves in the first place. These are cordate at their base and mainly inequilateral, but the general shape varies to a considerable extent. This variation is closely related to the position of the leaves on the twigs, and shows distinct indications of complying with the general law of periodicity.

Hugo de Vries - Species and Varieties, Their Origin by Mutation