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II.—Notes on new and imperfectly known Cretaceous Polyzoa
Published online by Cambridge University Press: 01 May 2009
Extract
Besides the series of Membraniporellæ last described there are several other Cribrilinidæ which develop a secondary aperture in the same way, and the next four species are instances.
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- Copyright © Cambridge University Press 1917
References
1 Geol. Mag., 1910, p. 391, Pl. XXX, Figs. 6–8.Google Scholar
1 Geol. Mag., 1909, p. 398, Pl. XXII, Figs. 4, 5.Google Scholar
1 Geol. Mag., 1917, p. 50, Pl. III, Figs. 3, 4.Google Scholar
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