Dear Andrew et al.,
Such a shell (sorry - not siphonostomatous) is depicted at
<http://www.jaxshells.org/tursar.htm> with a brief discussion.
Harry
On Sat, 5 Oct 2002 19:31:43 +1200 Andrew Grebneff
<[log in to unmask]> wrote:
> If anyone has access to a hyperstrophic
> specimen of a normally
> orthostrophic gastropod (see previous posting
> on aperture),
> especially of a canal-bearing
> (siphonostomatous) species, I would
> dearly love an image... or even obtain the
> specimen!