[184] J. W. Taylor, Journ. of Conch. v. p. 289, an interesting article, with many useful references.
[185] Möbius, Report on ‘Pommerania’ Exped. pp. 138–141.
[186] Journ. de Conchyl. xxiii. 1875, p. 105.
[187] J. W. Taylor ut sup. p. 300.
[188] Sci. Trans. R. Dubl. Soc. (2) iv. p. 555.
[189] J. S. Gibbons, Journ. of Conch. ii. p. 129.
[190] C. H. Morris, ibid. vii. p. 191.
[191] F. M. Hele, ibid. iv. p. 93.
[192] T. D. A. Cockerell, Science Gossip, 1887, p. 67.
[193] J. G. Jeffreys, British Conchology, vol. i. p. 214.