[164] Von Graff, Z. wiss. Zool xxv. p. 124.
[165] Proc. Amer. Phil. Soc. xxv. p. 231.
[166] Ergeb. naturw. Forsch. Ceylon, abstr. in Journ. Roy. Micr. Soc. (2) vi. p. 412.
[167] Voyage of the Samarang, Moll. p. 69, Pl. xi. f. 1; p. 47, Pl. xvii. f. 5.
[168] E. A. Smith, Ann. Mag. Nat. Hist. (6) iii. p. 270.
[169] Journ. de Conch. (3) xxix. p. 101.
[170] Zool. Jahrb. Abth. f. Syst. v. p. 619.
[171] See especially Semper, Animal Life, Ed. 1, p. 351.
[172] Gould, Moll. of U.S. expl. exped. 1852, p. 207 (St. acicula, from Fiji).
[173] Stimpson, Proc. Bost. Soc. N. H. vi. 1858, p. 308.