The shell is 15 mm in length and is usually white, beige, or brown, with or without black markings. It is egg shaped (
ovate) with an elevated
spire. The
columella or central axis of the shell has a large double fold.[3]
^Rudman, W.B., 2003 (22 May) Pupa kirki (Hutton, 1873). [In] Sea Slug Forum. Australian Museum, Sydney. Available from
"The Sea Slug Forum - Pupa kirki". Archived from
the original on 15 June 2010. Retrieved 24 August 2009.
Dautzenberg, Ph. (1929). Contribution à l'étude de la faune de Madagascar: Mollusca marina testacea. Faune des colonies françaises, III(fasc. 4). Société d'Editions géographiques, maritimes et coloniales: Paris. 321–636, plates IV-VII pp.
Beu A.G. (2004) Marine Mollusca of oxygen isotope stages of the last 2 million years in New Zealand. Part 1: Revised generic positions and recognition of warm-water and cool-water migrants. Journal of the Royal Society of New Zealand 34(2): 111–265. page(s): 218
Burn R. (2006) A checklist and bibliography of the Opisthobranchia (Mollusca: Gastropoda) of Victoria and the Bass Strait area, south-eastern Australia. Museum Victoria Science Reports 10:1–42.