Shells: Seashells, Snail Shells, Corals - MULTIVIEW For Sale
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Shells: Seashells, Snail Shells, Corals - MULTIVIEW:
$8.50
Shells: Seashells, Snail Shells, Corals - MULTIVIEW: A shell is a hard outer layer, which has evolved in a very wide variety of different animals, including mollusks, sea urchins, crustaceans, turtles and tortoises, armadillos, etc. A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer created by an animal that lives in the sea. The shell is part of the body of the animal. Empty seashells are often found washed up on beaches by beachcombers. The shells are empty because the animal has died and the soft parts have been eaten by another animal or have decomposed. A seashell is usually the exoskeleton of an invertebrate (an animal without a backbone), and is typically composed of calcium carbonate or chitin. Most shells that are found on beaches are the shells of marine mollusks, partly because these shells are usually made of calcium carbonate, and endure better than shells made of chitin. Seashells have been used by humans for many different purposes throughout history and pre-history. However, seashells are not the only kind of shells; in various habitats, there are shells from freshwater animals such as freshwater mussels and freshwater snails, and shells of land snails. This Photochromatic postcard is in good condition, but there is some edge wear and a small scrape. Dexter Press. West Nyack, N.Y. No. D-54425-B.
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