Jeffreys, J.G. 1884. On the Mollusca procured during the 'Lightning' and 'Porcupine' Expeditions, 1868-70. (Part VIII). Proc. Zool. Soc. Lond. 1884, 1 Oct 1884: 341-372, pls. XXVI-XXVIII. ["20 May 1884"] ≡