Apple Shell Small 320×180 Medium 640×360 Large 1024×576 Download Tiff Original 2400×1351 | (396.2 KB) Description "The species are numerous, and are chiefly found in the fresh waters of tropical and subtropical countries, many of them being known as apple-shells and idol-shells."-Whitney, 1902 Keywords apple-shell, idol shell, idol-shell, snail Galleries Snails and Slugs Source: William Dwight Whitney, The Century Dictionary, an Encyclopedic Lexicon of the English Language (New York: The Century Co., 1902)I:188