Boone 1938. The marine Algae, Coelenterata, Annelida Polychaeta, Echinodermata, Crustacea and Mollusca of the world cruises of the yachts "Ara" 1928-1929, and "Alva," 1931 "Alva" Mediterranean cruise, and "Alva" South American cruise, 1933, William K. Vanderbilt, commanding. Part IV-Echinodermata. Bulletin of the Vanderbilt Marine Museum, 7 1938: pp. 115-193