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A Revision of the Fauna of the North Welsh Conocoryphe viola Beds implying a Lower Cambrian Age

Published online by Cambridge University Press:  01 May 2009

B. F. Howell  and
C. J. Stubblefield
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Abstract

Fossils collected during the past sixty years from the uppermost division of the approximately 2,000 ft. thick Llanberis Slates have been re-examined. All but one fossil came from the famous Penrhyn Quarries at Bethesda, Caernarvonshire. The fauna is described as containing Pseudatops viola (H. Woodward), Eodiscus sp., cf. Protolenus howleyi (Walcott), Hyolithes cf. hathewayi G. F. Matthew, H. sp., and a fragmentary crustacean. The last offers no evidence of age but the remainder are considered to indicate a high Lower Cambrian horizon. Illustrations of some of these fossils are given for the first time. The Hyolithes is interpreted as carrying a pair of fin-like skeletal outgrowths and the morphological significance of these is discussed in a statement which comments on the obscure systematic position of the Hyolithidae.

Type
Articles
Information
Geological Magazine , Volume 87 , Issue 1 , February 1950 , pp. 1 - 16
Copyright
Copyright © Cambridge University Press 1950

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References

10. REFERENCES

Cobbold, E. S., 1936. The Conchostraca of the Cambrian of Comley, Shropshire with a Note on a new Variety of Atops reticulatus (Walcott). Quart. Journ. Geol. Soc., xcii, 221–235.CrossRefGoogle Scholar
Emmons, E., 1844. Taconic System (4° pamphlet), Albany, pp. 19–21.Google Scholar
Emmons, E. S., 1855. Amer. Geologist, i, 115, p1. 1, fig. 16.Google Scholar
Evans, J. J., 1883. Geology of Bethesda District. Trans. Bethesda Lit. and Sci. Soc.Google Scholar
Ford, S. W., 1873. Remarks on the Distribution of the Fossils in the Lower Potsdam Rocks at Troy, N.Y., with descriptions of a few new species. Amer. journ. Sci. [3], vi, 134–140.CrossRefGoogle Scholar
Grabau, A. W., and Shimer, H. W., 1909. North American Index Fossils, Invertebrates, ii, 1. New York.CrossRefGoogle Scholar
Greenly, E., 1944. The Cambrian Rocks of Arvon. Geol. Mag., lxxxi, 170–5, 238.CrossRefGoogle Scholar
Greenly, E., 1946. The Monio-Cambrian Interval. Geol. Mag., lxxxiii, 237–240.CrossRefGoogle Scholar
Griffiths, I., 1935. In Smith, B., and George, T. N.. British Regional Geology, North Wales. Text-fig. 10, p. 29, see also p. 28.Google Scholar
Haldeman, S. S., 1848. On the supposed identities of Atops trilineatus with Triarthrus becki. Amer. Journ. Sci. [2], 5, 107, 108.Google Scholar
Hall, J., 1847. Palaeontology of New York, i, 252, p1. lxvii, figs. 4a-e.Google Scholar
Holm, G., 1893. Sveriges Kambrisk-Siluriska Hyolithidae och Conulariidae. Sver. Geol Undersökn. Ser. [C], 112, 173.Google Scholar
Hughes, T. McK., 1889. Note on the Lower Cambrian of Bethesda, North Wales. Geol. Mag., xxvi, 8–15.CrossRefGoogle Scholar
Jones, O. T., 1938. The Anniversary Address of the President. On the Evolution of a Geosyncline. Proc. Geol. Soc., xciv, lx–cx.Google Scholar
Knight, J. B., 1941. Paleozoic Gastropod Genotypes. Geol. Soc. Amer. Spec. Pap., 32.Google Scholar
Kobayashi, T., 1943. Brief Notes on the Eodiscids I, Their Classification with a Description of a New Species and a New Variety, Proc. Imp. Acad. Tokyo, xix, 37–42.CrossRefGoogle Scholar
Kobayashi, T., 1944. On the Eodiscids, J. Fac. Sci. Imp. Univ. Tokyo [2], vii, 74 pp.Google Scholar
Lake, P., 1931. A monograph of British Cambrian Trilobites, pt. vi. Palaeont. Soc. London.Google Scholar
Lake, P., 1932. A monograph of British Cambrian Trilobites, p. viiGoogle Scholar
Lake, P., 1940. A monograph of British Cambrian Trilobites, p. xiiGoogle Scholar
Lapworth, C., 1888. On the Discovery of the Olenellus Fauna in the Lower Cambrian Rocks of Great Britain. Geol. Mag., xxv, 484–7.CrossRefGoogle Scholar
Matthew, G. F., 1899. Studies on Cambrian Faunas No. 4—Fragments of the Cambrian Faunas of Newfoundland. Trans. R. Soc. Canada [2] v, section iv, 67–95.Google Scholar
Matthew, G. F., 1899 a. The Etcheminian Fauna of Smith Sound, Newfoundland. Trans. R. Soc. Canada 97–119.Google Scholar
Miller, S. A., 1889. North American Geology and Palaeontology. Cincinnati.Google Scholar
Morris, T. O., and Fearnsides, W. G., 1926. The Stratigraphy and Structure of the Cambrian Slate-belt of Nantlle, Carnarvonshire. Quart. Journ. Geol. Soc., lxxxii, 250–303.CrossRefGoogle Scholar
Novák, O., 1891. Revision der Palaeozoischen Hyolithiden Böhmens. Abh. k.böhm. Gesell. Wiss., vii, Bd. 4, Math.-nat. Cl. 6, 49.Google Scholar
Pelseneer, P., 1888. Rep. Sci. Results of the Voyage of H.M.S. Challenger during… 1873–76… 23. London, Edinburgh, and Dublin.Google Scholar
Richter, R. and E., , 1923. Eine cambrische Fauna in Niederschlesischen Schiefergebirge. Centralbl. Min. Stuttgart, 730–735.Google Scholar
Richter, P., 1941. Studien im Paläozoikum der Mittelmeer-Länder, 6. Die Fauna des Unter-Kambriums von Cala in Andalusien. Abh. Senckenberg. Naturf. Gesell., 455, 90 pp.Google Scholar
Richter, P., 1948. Zur Frage des Unter-Kambrium, in Nordost-Spanien, Senckenbergiana. Frankfurt 29, 23–39.Google Scholar
Schwarzbach, M., 1933. Das Cambrium der Oberlausitz. Abh. Naturf. Ges. Görlitz, 32, 2, 7–54.Google Scholar
Walcott, C. D., 1886.1 Second Contribution to the Cambrian Faunas of North America. U.S. Geol. Surv., Bull. 30, dated 1886.CrossRefGoogle Scholar
Walcott, C. D., 1887. Fauna of the “Upper Taconic” of Emmons in Washington County, N.Y. Amer. Journ. Sci. [3], 34, 187–199.CrossRefGoogle Scholar
Walcott, C. D., 1889. Stratigraphic Position of the Olenellus Fauna in North America and Europe. Amer. Journ. Sci. [3], xxxvii, 374–392, xxxviii, 29–42.CrossRefGoogle Scholar
Walcott, C. D., 1889 a. Descriptive notes of new genera and species from the Lower Cambrian or Olenellus Zone of North America. Proc. U.S. Nat. Mus., xii, 763, 33–46.Google Scholar
Walcott, C. D., 1890. The Fauna of the Lower Cambrian or Olenellus Zone. 10th Rep. U.S. Geol. Surv. Washington, 515–658.Google Scholar
Walcott, C. D., 1911. Cambrian Geology and Paleontology II, no. 5. Middle Cambrian Annelids. Smithson. Misc. Coll., 57, No. 5.Google Scholar
Williams, D., 1930. The Geology of the Country between Nant Peris and Nant Ffrancon (Snowdonia). Quart. Journ. Geol. Soc., lxxvi, 191–233.CrossRefGoogle Scholar
Woodward, H., 1888. On the Discovery of Trilobites in the Upper Green (Cambrian) Slates of the Penrhyn Quarries, Bethesda, near Bangor, North Wales. Quart. Journ. Geol. Soc., xliv, 74–8.CrossRefGoogle Scholar