OXUCLÆ, in natural history, the name of a genus of fossils of the class of the selenitæ, but of the columnar, not the rhomboidal kind.
Of this genus there are only two known species. 1. A fine kind, with thin flakes and transverse filaments, found in the clayey banks of the river Nen, near Peterborough, in Northamptonshire; and, 2. A dull kind, with thick plates and longitudinal filaments. This is not uncommon in Yorkshire, and lies sometimes in a yellow, sometimes in a blue clay.