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Date: | Sat, 16 May 1998 00:10:38 +0100 |
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Dear, all
Have been noticing that certain shells like Bolinus brandaris, Hexaplex
trunculus, Opalia crenata and even the pelagic Janthina balteata produce a
purple dye pigment? or fluid?. My curiosity is whether this pigment? or
fluid?, is an act of defence or is it secreted by the animal when in
stress, since when I collect live animals, they normally never show traces
of this pigment? or fluid? Immediately ?
Is this purple dye present in many other shells besides these ? Do (or
did) any other cultures use similar pigments like the ancient Romans did ?
Would really appreciate hearing your comments !!
My very best shelling regards to you all,
Carlos
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