Labels:bulletin board | trade name | web site OCR: MOLLUSCS Gastropods sources. The snaillike conches secrete a material that hardens 10 form the lovely shells prized by collectors and sought ancient times by skilled tradesmen who carved cameos on their surfaces The huge roadside piles of bleached conch shells throughout the Caribbean make sad state- ment about our overuse valuable ocean resources. Another signature species of gastropod in the Caribbean, the OF surtaces
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