original description(ofChascax R. B. Watson, 1873)Watson, R. B. (1873). On some marine mollusca from Madeira, including a new genus of the Muricinae, a new <i>Eulima</i> and the whole of the <i>Rissoa</i> of the group of islands. <em>Proceedings of the Zoological Society of London.</em> 1873: 361-391., available online athttp://www.biodiversitylibrary.org/page/28504606[details]