Abstract
THE fifth part of the nineteenth volume of the Palæontographica recently published, is devoted to the description by Prof. Schenk, of fossil plants from the north German Wealden formation. The plants here described and figured upon 8 plates are all cryptogamous, and with the exception of a single Chara, and four Equiseta belong to the group of ferns, of which 21 species are noticed; but it must be remarked that Prof. Schenk bas considerably lessened the apparent number of species by reducing a great many of the names given by former authors to the rank of synonyms. At the same time he describes and figures seven forms as new species, one as the type of a new genus, Marsilidium, belonging to the Rhizocarpeæ, and he also establishes the new genus Matonidium for Laccopteris Gopperti, Schimper. The other new species belong to the genera Sphenopteris, Alethopteris, Laccopteris, Oleandridium, Dictyophyllum and Protoptris, the last being doubtfully represented by a portion of a tree-like stem.
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Scientific Serials . Nature 4, 35–36 (1871). https://doi.org/10.1038/004035a0
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DOI: https://doi.org/10.1038/004035a0