FIGURES 1–6 in Tractolira delli, a new Volutidae (Mollusca: Gastropoda: Neogastropoda) from the abyssal plains off Antarctica

FIGURES 1–6. Shells of Tractolira species. 1, 2, 5. Tractolira delli new species. 1. Holotype, USNM 860631, 52.4 mm length (broken shell), Scott Island Bank, eastern Ross Sea, Antarctica, 69º03'–69º05' S, 179º41'– 179º22' E, 3519–3596 m. Scale bar = 20 mm. 2. Paratype 1, off Victoria Land, Antarctica, USNM 860632, 72º58'–72º57' S, 174º24'–174º25' E. Scale bar = 10 mm. 5. Paratype 1, detail of shell surface on penultimate whorl. Scale bar = 1 mm. 3. Tractolira sparta Dall, 1896, holotype, USNM 122999, 60.0 mm length, USNS ALBATROSS station 3360, 24 Feb. 1891,"Gulf of Panama to Acapulco", Mexico. 4, 6. Tractolira germonae Harasewych, 1987. 4. Holotype, USNM 859076, 59.1 mm length, east of Candlemas Island, South Sandwich Islands. Scale bar = 20 mm. 6. USNM 860623, detail of shell surface on penultimate whorl. Scale bar = 1 mm.