A Monograph of the Silurian and Devonian Corals of New South Wales

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    Abstract

    THIS part deals with the genus Tryplasma, of which several new species are described, from the Upper Silurian of the neighbourhood of Yass. A history of the genus is given, together with an account of its relations to other genera and its systematic position. Attention is directed to the intimate relation existing between the structure of Lindström's Pholidophyllum and that of Tryplasma, but in none of the Australian species of the latter have been found any of the exothecal scales which led Lindström to consider Pholidophyllum tubulatitm (Schloth.) homologous in a certain sense with Calceola, Goniophyllum, and Rhizophyllum. The author advocates the removal of Ph. tubulatum, as a representative Tryplasma, o from the vicinity of the Anthozoa operculata to a separate family, the Tryplasmidæ, with relations to Amplexus and Pycnostylus. The general structure of the Australian Tryplasmidæ is described in detail, but the examination of the development of the septal lamellæ and spines by means of serial sections was not attempted.

    A Monograph of the Silurian and Devonian Corals of New South Wales.

    Part ii. By R. Etheridge jun. (Sydney, 1907.)

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    A Monograph of the Silurian and Devonian Corals of New South Wales . Nature 78, 569 (1908) doi:10.1038/078569a0

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