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Published online by Cambridge University Press: 01 May 2009
page 573 note 1 Geol. Mag. 1888, Dec. III. Vol. V. p. 553.
page 573 note 2 Geol. Mag. 1889, Dec. III. Vol. VI. p. 114.
page 573 note 3 Geol. Mag. 1889, Dec. III. VoL VI. p. 425.