On the Structure And Affinities of the Tabulate Corals of the Palaeozoic Perio
On the Structure And Affinities of the Tabulate Corals of the Palaeozoic Perio
Nicholson Henry Alleyne
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Favosites spongites (?), Phillips, Pal. Foss. , p. 16, PL VIIL, fig. 23, 1841. Alveolites suborbicularis, Milne-Edwards and Haime, Pol. Foss. Des Terr. Pal. , p. 255, 1851, and Brit. Foss. Cor. , p. 219, PL XLIX. , figs. I and i a, 1853. Spec. Char. Corallum forming masses of considerable size and variable form, consisting of concentrically superposed layers, attached parasitically to some foreign body, and having an irregularly elevated surface. Corallites very oblique, com- pressed, mostly su...btriangular, with a long convex and two short concave sides, but very variable in form, though never regularly polygonal or cylindrical. Long diameter of the tubes about one-third of a line, transverse diameter about one-sixth of a line. Walls moderately but not excessively thick, not in- crassated towards the terminations of the tubes, and pierced by few remote mural pores. Septa represented only by a single longitudinal ridge, which does not appear to be constantly present. Tabulae numerous, close-set, horizontal, complete.
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