original description(ofSeguenzia laxa Jeffreys, 1885)Jeffreys, J. G. (1885). On the Mollusca procured during the 'Lightning' and 'Porcupine' expeditions, 1868-70 (Part IX). <em>Proceedings of the Zoological Society of London.</em> 1885 : 27-63, pl. 4-6., available online athttp://www.biodiversitylibrary.org/page/31015014 page(s): 44 ; pl. 5 fig. 4-4a [details]