Published online by Cambridge University Press: 01 May 2009
To illustrate the value of graphic methods when changes in a number of distinct structural elements are studied, examples may be taken from the Carboniferous corals. These are well suited to the purpose, because thin slices yield so much information and are easily measured. In Fig. 4 a diagrammatic section is shown of one of the most highly organized corals, which exhibits the following important structural units: epitheca, tabulæ, septa, dissepiments, tabellæ, lamellæ, columella.
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