Two 'bubble shells' from Indonesia

November 9, 2005
From: Wendy Atkinson

Hi Bill
These were found in Lembeh Strait, Indonesia, May 2005, at Police Pier. Upper photo: 35-40 foot depth, sandy bottom.
Lower photo: 40-60 foot depth, sandy bottom

I'm hoping you can narrow down what types of bubble shells these are. Do you think that they may be variants of the same type?
Thanks in advance,
Wendy Atkinson

Atkinson, W., 2005 (Nov 9) Two 'bubble shells' from Indonesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Wendy,
Yes these are variants of one species. It is Philinopsis pilsbryi.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Nov 9). Comment on Two 'bubble shells' from Indonesia by Wendy Atkinson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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