Zoila alabaster n. sp. from NW Australia (Gastropoda: Cypraeidae)

Zoila alabaster n. sp. is described from the Broome area off Western Australia and compared with Z. decipiens (E. A. SMITH 1880) and Z. mariellae RAYBAUDI 1983. The shell is white, with lemon-yellow basal patches. Although referred to as an albino, the animal is black. The projecting, produced, anterior terminal ridge, the convex base with rounded margins, and the short, rounded, posterior extremity distinguish this species from its relatives, in addition to its unusual, pale coloration. A dorsal groove and dorsal tubercles of mature Z. alabaster n. sp. are not found in any other species of the genus.