October 12, 2001
From: Cory Pittman
On Maui, I've seen several thousand valves with a maximum shell length of 3.4 mm. The color is highly consistent with narrow, continuous brown bands on the anterior portion of the shell and broader, fainter bands on the posterior portion. The bands are superimposed over random white blotches. The hinge is relatively small and constricted. The central, tooth-like knob is nearly circular in cross section with only a slight indentation on its posterior margin.
I've found shells in sand samples (sent to me by Pauline Fiene-Severns and Jerry Flora) from Abemama Atoll, Midway Atoll, Raratonga and Magaia(Cook Islands).
The shell photos are of a closely matched (though slightly worn) pair 2.9 mm in length. They were in a sand sample collected from beach drift at Makuleia Bay, Maui in 1983.
Pittman, C., 2001 (Oct 12) Shell of Julia zebra. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5375