Tonna rosemaryae Vos, 1999 coll. C. Vos ref. TT143 " Kaoshiung, Taiwan, 1995, at 100 metres.", 97mm. General shape broadly shouldered and spherical. Spiral sculpture of broad rounded primary cords which are more widely spaced on the upper half of the whorl and closer together on the lower half. Secondary threads can occur in the interspaces. Most striking feature is the yellowish orange inner colour of the aperture. Lip sharp in growth phase, and only slightly thickened in the rest phase.