III.—On Columnopora, a new Genus of Tabulate Corals

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Abstract
Gen. Char.—Corallum aggregate, massive, composed of hexagonal corallites, which have distinct walls, but are firmly united with one another. Septa well developed and close-set, but short and not nearly reaching the centre of the theca. A row of large and closely-approximated mural pores between each pair of septa. Tabulæ horizontal, not vesicular or infundibuliform, apparently incomplete. Epitheca unknown. No coenoenchyma.

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