The Journal of the Geological Society of Japan

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The structure of some Cretaceous plants collected from Karahuto (South Saghalin) are studied under the microscope and their affinities are discussed., The material comprise; 1., Cladophlebis frigida (HEER)., Several pinnulae with well preserved vascular bundles., 2., ? Nilssonia sp., A part of parallel-veined leaf: it is more simply constructed than in Nilssonia orientalis described by STOPES., 3., Nipponophyllum sp., A part of parallel-veined leaf with well developed palisade tissue, hypodermis, endodermis, and sclerenchyma, without resin canal., In structure it is nearer to Nipponophyllum cordaitiforme STOPES et FUJII than to any other gymnospermous leaves such as Ginkgo biloba, Araucaria Bidwilli, Podocarpus Nagi, Cordaites spp., Nilssonia orientalis, and Desmiophyllum Solmsi, but the two are not the same in species., 4., Brachyphyllum spp., Two forms are found: one is quite identical with Yezonia vulgaris STOPES et FUJII (Brachyphyllum vulgare), while the other is structurally new, and is somewhat like B., crassum., 5., Geinitzia and Cryptomeriopsis., Three forms are found: the first form is identical with Cryptomeriopsis antiqua STOPES et FUJII; the second, represented by a curved acerousleaf, somewhat resembles Geinitzia Reichenbachii HOLLICK et JEFFREY in structure; the third is a poorly preserved branch with compressed linear leaves., 6., Piccophyllum sp., Leaf of Picca sp., with two resin canals and a vascular bundle surrounded by well developed endodermis., 7., Strobilites sp., (aff., microsporophorus HOLLICK et JEFFREY)., Staminate strobile of taxodiacean or cupressacean plants., 1., Cladophlebis frigida; transverse section of the pinnule., 2., ? Nilssonia sp., ; transverse section of the leaf., 3., Nipponophyllum sp., ; transverse section of the leaf., 4., Piceophyllum sp., ; transverse section of the leaf., 5., Cryptomeriopsis antiqua; transverse section of the leaf., 6., The same; logitudinal section of the branch., 7., Geinitzia sp., ; transverse section of the branch., 8., Brachyphyllum sp., ; transverse section of the branch., 9., Brachyphyllum vulgare; logitudinal section of the leaf., 10., ? Geinitzia sp., ; transverse section of the branch., 11., Strobilites sp., ; transverse section of the male cone.,

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