Sowerby, G.B. 1833. Characters of new species of shells from the collection formed by Mr. Cuming on the western coast of South America and among the islands of the South Pacific Ocean. Proceedings of the Zoological Society of London 1833: 16-22, 34-38. Available electronically.
Sowerby, 1833. Proc. Zool. Soc. London 1833: 35.