G.  Rosenberg, The encyclopedia of seashells. New York: Dorset Press, 1992, p. 224.

B.  Morton, Partnerships in the sea: Hong Kong's marine symbioses. Hong Kong: Hong Kong University Press, 1988, p. 124.

B.  Morton, Partnerships in the sea: Hong Kong's marine symbioses. Hong Kong: Hong Kong University Press, 1988, p. 124.

G.  Rosenberg, The encyclopedia of seashells. New York: Dorset Press, 1992, p. 224.