Favorinus sp. 2.
Known only from this record from Okinawa. (See Bob Bolland's message below).
Note added 26 July 2002: I think this is probably a colour form of Favorinus mirabilis. Have moved messages to Favorinus cf. mirabilis page.Authorship details
Rudman, W.B., 1998 (September 4) Favorinus sp. 2. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/favosp2