National Geographic : 1949 Jul
© National Geographic Sacitty 71 Ilacihrno e by ttuthertordl Platt Among the Rarest Shells in the World Are These from the U. S. National Museum Specimen No. 3, long believed to be unique, was found by John B. Henderson, Jr., on an expedition to Barbados. The large shell. No. 7, is unusual in that numerous fossil forms of it have been discovered, but only a few live specimens have been found. (1) Cancellaria trigonostoma; (2) Fenimorea janetae (Puerto Rico); (3) Sthenorytis pernobilis (Barbados) ; (4) Eldridgea johnsoni (Puerto Rico); (5) Basilissa babelica (Japan) ; (6) Calliostoma haliarchus (Japan); (7) Pleurotomnaria salmiana (Japan) ; (8) Rehderia schmitti (Florida) ; (9) Murex beaui (Cuba); (10) Tibia martinii (Philippines); (11) Lima dalli (Philippines).