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Published online by Cambridge University Press: 01 May 2009
page 37 note 1 See Sorby, H. C. F.E.S., “On Structure of Shells,— Anniversary Address to Geol. Soc. Lond. 1879, pp. 56–93, Quart. Journ. Geol. Soc. vol. xxxv.Google Scholar
page 38 note 1 Quart. Journ. Geol. Soc. 1847, p. 29.