CTAN update: pst-shell
Added some more predefined shells: Ammonite, Codakia, Escalaria, Helcion, Natalina, and Planorbis
The package's Catalogue entry can be viewed at http://www.ctan.org/pkg/pst-shell The package's files themselves can be inspected at http://mirror.ctan.org/graphics/pstricks/contrib/pst-shell
Thanks for the upload. For the CTAN Team Erik Braun
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pst-shell – Plotting sea shells
pst-shell is a PSTricks related package to draw seashells in 3D view: Argonauta, Epiteonium, Lyria, Turritella, Tonna, Achatina, Oxystele, Conus, Ammonite, Codakia, Escalaria, Helcion, Natalina, Planorbis, and Nautilus, all with different parameters.
pst-shell needs pst-solides3d and an up-to-date PSTricks, which should be part of your local TeX installation, otherwise get it from a CTAN server.