1. Ceras of C. gymnota from Alder & Hancock (1845-55) showing “tricolour” pattern. The orange is often missing on small specimens of about 6mm. On larger specimens, powdery orange may predominate with only a small indistinct band of white.
2. Ceras of C. gymnota from Alder & Hancock (1845-55) showing “tricolour” pattern. The orange is often missing on small specimens of about 6mm. On larger specimens, powdery orange may predominate with only a small indistinct band of white.

Ceras of C. gymnota from Alder & Hancock (1845-55) showing “tricolour” pattern. The orange is often missing on small specimens of about 6mm. On larger specimens, powdery orange may predominate with only a small indistinct band of white.