W. John Dakin, ?The eyes of Pecten, Spondylus, Amussium and allied lamellibranchs, with a short discussion of their evolution?, Proceedings of the Royal Society of London. Series B, vol. 103, pp. 355-365, 1928.

W. John Dakin, ?The anatomy and phylogeny of Spondylus, with a particular reference to the lamellibranch nervous system?, Proceedings of the Royal Society of London. Series B, vol. 103, pp. 337-354, 1928.