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I.—On Olenellus Callavei and its Geological Relationships

Published online by Cambridge University Press:  01 May 2009

Charles Lapworth
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Extract

In the year 1888 I published a short paper in the pages of the Geological Magazine and in “Nature,” in which I gave a brief account of the discovery of the fauna of the Olenellus (or Lower Cambrian) zone in the Comley or Hollybush Sandstone of Shropshire. Since that date great advances have been made in our knowledge of the Olenellus fauna of other areas, and the Olenellus zone has now generally attained an established rank and systematic position in the Geological Record as the basal zone of the Cambrian system.

Type
Original Articles
Information
Geological Magazine , Volume 8 , Issue 12 , December 1891 , pp. 529 - 536
Copyright
Copyright © Cambridge University Press 1891

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References

page 529 note 1 Lapworth, , “On the Discovery of the Olenellus Fauna in the Lower Cambrian Rocks of Britain,” Geological Magazine, 1888, Dec. III . Vol. V. p. 485Google Scholar.

page 529 note 2 “Nature,” vol. xxix. p. 213Google Scholar.

page 529 note 3 See next page.

page 531 note 1 Geol. Mag. etc., loc. cit. supra. Fauna Olenellus Zone, pp. 640–641Google Scholar.

page 531 note 2 Geol. Mag. 1888. p. 641Google Scholar.

page 531 note 3 Matthew, Trans. Roy. Soc. Canada, 1890, p. 160Google Scholar.

page 532 note 1 Paradoxidis Groomii, sp. nov. In general form and size intermediate between Par. Harlani (Green) and Par. Davidis (Salter). Length 8 to 9 inches, breadth 5½. Head semi-circular, with pointed genal spines from two to three inches in length. Glabella prominent, clavate, more than half its length being occupied by the broadly rounded and smooth frontal lobe. Hypostoma of the type of that of Par. Bohemicus (Boeck). Pleurœ (no ?) falcate, and sharply pointed. Pygidium a raised disc with central tubercle; embraced laterally by long, sabre-like, distally-diverging spines. Localities. Neves Castle (Lapw., 1889) and Comley (Groom, 1890). Named after T. Theo. Groom, Esq., B.Sc., who first collected fragments sufficient for description.

page 533 note 1 Callaway, C., “Upper Cambrian Rocks in South Shropshire,” Q.J.G.S. 1877, p. 652, etc.Google Scholar

page 533 note 2 As Elliptocephala asaphoides, Emmons, Taconic System, 1846, p. 213Google Scholar, figs. 1, 2, 3.

page 533 note 3 Emmons' American Geology, 1855, pt. ii. pp. 6 and 7, etcGoogle Scholar.

page 534 note 1 Blake, J. F., On the Monian and Basal-Cambrian Rocks of Shropshire, Q.J.G.S. 1890, p. 386, et. seq.Google Scholar

page 534 note 2 SirGeikie, A., Anniversary Address, Q.J.G.S. 1891, pp. 86–90Google Scholar.

page 534 note 3 SirGeikie, A., Geol. Mag. 1891, p 449Google Scholar.

page 534 note 4 See ante p. 532.

page 534 note 5 Ibid p.449.

page 535 note 1 DrKatzer, Fr., Das ältere Palæozoicum in Mittel Böhmen, Prague, 1888, pp. 5, 7Google Scholar.

page 535 note 2 Siluria, , 4th edition, p. 273Google Scholar.

page 535 note 3 DrWentzel, Josef, Die Beziehungen der Barrandischen Etagen C, D, E zum Britischen Silur., Jahrbuch d. k. k Reichsanstalt, Wien, 1891, p. 119Google Scholar.

page 535 note 4 Bigot, A., L'Archéen et le Cambrien du Massif Breton, Cherbourg, 1890, pp. 25, 73, etc.Google Scholar

page 535 note 5 Bergeron, J., Etude géologique du Massif ancien du Plateau Central, Paris, 1889, p. 78, pl. iiGoogle Scholar.

page 535 note 6 The Silurien supérieur, Silurien moyen, and Silurien inférieur respectively, of the younger French geologists.