Transactions and proceedings of the Palaeontological Society of Japan
Online ISSN : 2186-0955
Print ISSN : 0031-0204
ISSN-L : 0031-0204
Volume 1941, Issue 20
Displaying 1-7 of 7 articles from this issue
  • Hisakatsu YABE, Tosio SUGIYAMA
    1941 Volume 1941 Issue 20 Pages 1-5
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
    The Hydrozoan coral, Circoporella semiclathrata HAYASAKA is a rather rare, yet very characteristic fossil in the Torinosu limestone developed in the Outer zone of South-West Japan, and in the Kwanto and Abukuma Mountainlands of North-East Japan. Very recency it was unexpectedly discovered in a dark gray limestone intercalated in a complex chiefly of schistose schalstein exposed at the east bank of the Saru-gawa, about 1.7km east of Sinnitô Mine in Horosari-mura, Saru-gun, Hokkaidô. Although only a fragmental one, the present material exhibits features characteristic of the coenosteum of Circoporella semiclathrata as described by FIAYASAKA; it occurred at the locality cited in association with such fossils as Nerinea (s. s.), Thanmastrea and other hexacorals. As fully stated in the Japanese text, this species is an important key-fossil of the Upper Jurassic not only in Japan, but also in abroad.
    Circoporella is very similar to Sphaeractinia in having the coenosteuin composed of concentric laniellae and vertical elements, the concentric lamellae being apparently two layered under high magnification, a thin film-like layer limiting the upper surface of a thick inner lying homogeneous substance, and having astorhizae though rarely. This genus was sometimes confounded with Burgundia MUNIER-CHALMAS, a stromatoporoid closely allied to Clathrodictyon and which possess coenosteum composed of trabeculae in vertical and horizontal sets, which are homogeneous in microstructure under high magnification; further astorhizae are lacking to it and zooidal tubes are present. In the renewed examination, the writers are now confident in regarding Burgundia and Circoporella to be generically independent on account of the differences mentioned above, and the species of Burgundia of European writer (Burgundia of. semiclathrata HAYASAKA from the Astartian of Villereversure, Ain, France) to be true Circoporella and not Burgundia.
    By way it may be pointed out that the Upper Jurassic marine deposits are divisible into three different types according to lithological and fossil contents., namely: 1) Torinosu type composed of shale and sandstone in alternation wi h lenses of limestone known under the name Torinosu limestone and often richly coralline, 2) Kitakami type of shale and sandstone and lacking limestone, and 3) Hokkaidô type having considerable amount of schalstein with limestone lenses which contains at least Circoporella found in the Torinosu type.
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  • Kotora M. HATAI, Tatuo OMURA
    1941 Volume 1941 Issue 20 Pages 6-9_1
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
    The genus Isogramma of the Isogrammidae was first established by F. B. MEEK and A. H. WORTHEN in 1870, based upon Chon tes millepunctata MEEK and WORTHEN. The generic diagnosis presented by C. O. DUNBAR and G. E. CONDRA. is as follows: Concavo-convex or plano-convex shens of transversely semielliptical outline. The greatest width is a little in front of the hinge-line and the cardinal extremities are normally a little rounded. The width is much greater than the length of the shell. The ventral valve is very gently convex and the dorsal gently concave or plane, the general form of the shell closely resembling that of a large transverse Chonetes, with the exception than in Isogramma the cardinal areas are obsolete or very narrow.
    Internally the ventral valve possesses a narrow but elongate triangular muscle platform. This structure stands a little above the level of the floor of the valve, has abruptly truncated sides an-I a surface that is near'y flat or depressed toward the mid-line. There is no foramen or deltidium and probably there are no hinge-teeth. The dorsal valve bears a small cardinal process whose base is continued forward as a low, narrow ridge to about the mid-length of the shell. Obscure traces of pallial sinuses radiate from the beak over most of the interior of this valve.
    The surface of the shell is marked by fine, sharply elevated, concentric line, separated by broarler, flat in!erspaces. The shell substance is moderately thick. According to BARROIS and PAECKELMANN, there is an imperforate epidermal layer. The rest of the shell, however, is abunlantly perforated with coarse, simple, tubular punctae, which open internally and in the fossil are commonly filld with matrix.
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  • Yanosuke OTUKA
    1941 Volume 1941 Issue 20 Pages 10-13
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
    In this short paper, the writer describes the results of his stratigraphic observations in North China. The Eastern Hill of Taiyuan-fu in the Shansi district stratigraphically consis's, descending order, of the redeposited loess, the loess (the Malan stage), the sand and gravel formation the Sanmenian stage, the purple or reddish chocholate sandstone (the Permo-Triassic), the brown sandstone, the Neuropteris-bearing shale (the Permo-Carboniferous), the limestone, the Chonetescarbonifera-bearing black shale (Middle Carboniferous), the alternation of black shale and sandstone, basal conglomerate with iron nodules, and the Cambro-Ordovician limestone.
    As may be seen from a comparison of the stratigraphic columns established by NORIN and other authors in the Western Hill of Taiyuan-fu and the Shihhotze valley with the writer's, it is likely that some Permian and Carboniferous stratigraphic facies in the former lack in the latter.
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  • Tuneteru OINOMIKADO
    1941 Volume 1941 Issue 20 Pages 14-16
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
    Material from two localities was examined for the Foraminifera. One of them is fine sand of the Koguti Formation exposed near Kanatu, Kanatu-mura, Nakakanbara-guu, the other is loose fine sand lense in the impure limestone at Osawa, Okanbara-mura, Nakakanbara-gun. The Foraminifera fauna of the two localities is relatively poor in number of species, but rich in number of individuals. The total number of the species now distinguished amounts. to 48; of them 32 are found at Kanatu; 34, including 1 new species, at Osawa.
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  • [in Japanese]
    1941 Volume 1941 Issue 20 Pages 17-26_1
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
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  • Franz SPILLMANN
    1941 Volume 1941 Issue 20 Pages 27-32
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
    Die Ausgrabungen in der Nahe des Ortes “La Libertad”, auf der Halbinsel Sta. Elena, an der Kuste Ekuadors, zeitigten unter anderen auch Reste eines Riesennagers, der zusammen mit den Knochen von Megatherium und Mylodon gefunden wurden. Die Reste sind sparlichsodass sich das zu beschreibende Material auf einen linken Unterkieferast mit kompletter Bezahnung der Backenzahnreihe und drei einzelne Backenzahne der entsprechenden rechten Unterkieferlialfte beschrankt.
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  • Seidô ENDÔ
    1941 Volume 1941 Issue 20 Pages 33-34
    Published: 1941
    Released on J-STAGE: March 18, 2011
    JOURNAL FREE ACCESS
    We have no definite information as to the systematic position of the genus Macclintockia; some species of the genus has usually been recognised as a representative of the Urticaceae or Myrtaceae on. the ground of similarity in the leaves but one of the species, M. lyallii from Kôbe, has great similarity to the leaves of Putamogetun franchetii, one of the species of Potamogetonaceae.
    From the geological occurrences it appears that the genus was widely distributed from the Cretaceous to the Miocene, but it was absent in East Asia in the upper Miocene age. The specimens, which were stored in the Institute of Geology and Palaeontology of the Telhoku Imperial University, Sendai, are as follows: I. Macclintockia trinerris HEER.
    Localities: 1. Tei, Maoka-mati, Karafuto.(Nisisyakutan formation)(Figure 1.)
    2. Honbetu, Mikasayama-mura, Sorati-gun, Hokkaidô.(Poronai Series)
    3. Horonitatibetu, Numata-mura, Uryu-gun, Hokkaidô, (Poronai Series)(Fugure 2.)
    4. Yubari-mati, Yubari-gun, Hokkaidô.(Poronai Series)
    5. Otiai-ike, Suma-ku, Kt-pe, Honsyû.
    II. Macclintockia cfr. trinervis HEER.
    Locality: Konsyun, Manchoukuo.
    III. Macclintockia lyallii HEER. Locality: Okuhata, Suma-ku, Kobe, Honsyû.
    IV. Macclintockia sachalinensis KRYSFITOFOVICH Locality: Tymovskaya Padj near Niklewicz's coal mine, North Saghalin.
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