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Published online by Cambridge University Press: 01 May 2009
page 23 note 1 See Mon. Carb. Limestone Trilobites, 1883, part i. pp. 17–19, plate iii. figs. 1–8.Google ScholarSee also Geol. Mag. 1883, Decade II. Vol. X. Fig. 3, p. 450.Google Scholar