Acmaea achates is a species of sea snail or true limpet, a marine gastropod mollusc in the family Acmaeidae, one of the families of true limpets.
Description The ovate shell is rather thin. It is convexly depressed, radiately densely striated with the striae here and there finely corded. The shell is intense black, irregularly variegated with lightning-marked white rays. The interior is bluish, with a broad black variegated border. Reeve, L. A. (1854-1855). Monograph of the genus Patella. In: Conchologia Iconica, or, illustrations of the shells of molluscous animals, vol. 8, pls 1-42 and unpaginated tex. L. Reeve & Co., London
Distribution This marine species occurs off India.
References
Subba Rao, N. V. (2003). Indian Seashells (Part 1) Polyplacophora and Gastropoda. Records of the Zoological Survey of India, Occasional Paper. 192: x + 416 pp., 96 pls.