National Geographic : 1949 Jul
© National Geograplic society 80 Kodachronmes Ibytutherford Platt Cutting Cross Sections of Pearly Shells Harder than Glass Is Delicate Work Here are four superb examples made for Mrs. Fiske Warren of Boston. The triton, Charonia trilonis (1), is used in Peru as a musical instrument in religious services. The central columella, or axis, shown in (2), Xancus an gulatus (Bahamas and Florida), is strikingly like the famous double staircase of the Chateau of Blois, France. Nos. 3 and 4 show different ways of cutting the common Giant Conch, Strombus gigas, of the Florida Keys.